31Mar05: BBC’s R4 Toady this week reported USGS reappraisal of their
original record of the Dec event, raising their Richter rating a decimal point
but also adding a newly estimated 40ft seabed uplift driven by the quake. Simple
sums schematised below (done 26Jan) guestimated by back calculation that the
tsunami was likely sourced from an initiating upwelling of 12m covering a 4km patch
directly above a seabed uplift. As emphasised here and earlier Meldrewisms, a
prerequisite for intense solitons is space-time compactness of the forcing source,
maximised in an impulsive vertical displacement of the entire water column. Maybe
it was more luck than judgement but 12m=40ft without any give or take and 12m as
offered was truly a testable item in old-school spirit, not a computationally contrived
retro-combination of the genie genre that has crudely corrupted so much of what
was once was the disciplinary dignity unique to physical philosophy. |||| Another
Toady this week reported an emergent cooperative initiative for telephonic relay
of tsunami warnings to threatened coastal strips around the Bay of Bengal. An obvious
post-caution of course but so sadly not the pre-caution that would have contained
the catastrophe ~ as observed below also demanding deserved distinction for functionally
beneficial preventative precaution as against precautionary prejudice that has
been falsely designated principle when postulated in pursuit of political purpose
without regard to reality. Present paradigm for this unprincipled practice would
be the meaningless mantra for IDism asserted as precautionary policy against
terrorism ~ an excuse for yet more wantonly wasted wads on kickback slush made all
the more gut-gobbing considering starkly vaster numbers who have died and will continue
dying from terrarism.
Channel 4 TV Dispatches
/ Equinox Specials 8-10PM Mon 24Jan exemplified repulsive realities of telly topicality
~ an hour of busking banter from ad hoc assemblages of charitable cash
creationists and then another hour of pulped pontificating from academic
amateur activists, and all of it in hot pursuit of audience attention rather
than actuality. It was gut-gobbing enough for me to set aside an emergent item
on further flawed follies by climate changers so as to foreword this one with
minimeldrewismic mention that I saw nothing to suggest my simple sums below are
other than plausibly proper perspectives on manipulative mastication of money
and meaning. The floodwater footage seemed only to support my simplistic
scaling for size, speed and hazardous ingress at remoter ranges as reported ~
namely, at 1000km from source, 3m deep (10m/s) by 30m long on landfall,
declining after 20 sec or so to 1m deep (5m/s) by 180m long. Although not
explicitly expressed earlier, they now seem satisfactory for the seriously
severer scenes nearer to epicentre ~ namely, at 100km from source, 10m deep
(30m/s) by 100m long on landfall, declining after 200sec or so to 1m deep
(5m/s) by 2000m long. However even if these sorry victims had heard the
initiation event they would have needed to react immediately and been
exceptionally able-bodied to escape a safe distance of several kilometres in
the available twenty minutes or so of tsunami transit across 100km at 100m/s or
so ~ many of course, especially young and old and infirmed, sadly simply
wouldn’t have been able to do it. Indeed with more like twelve than twenty
minutes available after allowing for sonic delay and inevitable hesitation,
very few could ever have hoped to escape without prescient intervention ~ which
as reported was amazingly forthcoming for a fortunate few who reacted
immediately to fearful flight by birds and animals. Saddest of all though is
the thought that no warning system in the world would ever have assisted such
an escape ~ and leaves me wondering whether its retrospective protagonists have
really thought through how many people actually resided in what must always
have been a tiny margin of salvation between those that were always doomed and
those for whom traditional telephonic response to any Richter7+ would have
sufficed in any case ~~ whether utilisation of resource wouldn’t be far better
spent on practical improvements even as simple sea defences as would of course
been much more likely implemented in earlier eras before computing and
communication consumed so much morality money in seizing the high ground of
imaginative innovation ~ or do I mean imaginary not imaginative when it comes
to actualities of achievements in duly deserved deliverables for pennies
provided from public purse?
Perspection Perception Deception Postscription
Massively manipulative
mediarisation of the latest terrarist (sic) attack on innocent civilians
secured solicited sympathy of course although awareness screamed sensibility
that it will not appear an excessive event in the death deeds of our
predominantly placid planet. >100K killings from Richter 7-9 tectonics occur
triennially or so, their cumulants conceivably comparable to those caused by
military machinery of political poseurs predicating policies on profitable
prejudices rather than principled prognostication. Undeniably outrageous of
course but in the context of >>100Kpa caused by uncured curable
complaints in the UK alone, not to mention comparable numbers globally as road
victims, all this breast-baring, subscription-seeking obsessive outcry seems
symptomatic of societal sickness rather than reasoned response.
As meaningful metric of this
madness consider that CO2ism alone continues to gobble globally gargantuan
£Bpa, much of it for junketing on pointless prognostications predicated on
meaningless modelling whilst idiotically intrusive ineffectual IDism seems set
to even exceed this extravagance. Tsunamics emerged especially during the past
decade as a branded beano courtesy of vox pop portrayals by parapoliticos
pandering pseudoscientce in such as the Beeb’s epic scifi Horizon on an
imaginary megamonster contrived as Canarian conveyance of transatlantic
inundation into the US heartland, at least swamp a substantial swathe all along
its eastern seaboard. Nonsense of course as almost reflexed by anyone with an
iota of the second law, also that shallow water initiation of solitons sources
thermoclinically dispersive / dissipative modes that were entirely excluded
from the equations announcing an Atlantic Armageddon.
Traditional tsunamis
triggered by deep-water detonations are an entirely separate species, long
since extensively documented and dating back before books by Lamb in 1930s,
Stoker in 1950s and Lighthill’ in 1970s, with this sound science even
incorporated as an early warning platform for the Pacific in place since the
1980s! I’d be surprised if any of the of the pop pundits ever heard of these
major monographs and amazed if they ever read any of their relevant bits never
mind digested their entireties before presuming to pontificate courtesy of
fanciful fartaries anchoring these blandly bantered bananas.
Corollary of course is to
ask just how much has been splashed on all this unavoidable endless uninformed
extemporisation ~ considering that advertising comes in at anything from
£K10-100 per minute and for maybe 10 minutes hourly, might plausibly assign equivalence
of £M100-1000pa per channel which would not be wildly inconsistent with Beebs’
licence loot of perhaps £B4pa from 30M or so households. With daily coverage of surely >10 hours
equivalent summed over principal UK channels (ie upper-end hourly cost), I’m
tempted to suggest maybe £M50 has been squandered on this sad silliness, all
the more so for its voyeuristically looped footage offensively dominated by
dreadful death. A similar amount can be attributed to parallel exploitation in
say 20M daily papers grossing say £M20pd with 40% “story” assignment over 10
days. Together then percy public paid out £M100 for this “privilege” on top of
directly donating £M50, so arguably then an overhead of 200% has been deflected
from frontline functionality. Percy public’s further £M50 pledged by HMG on
their behalf (though not exactly emphasised in posturing pronouncements) was
probably penalised in pretty much similar proportion, maybe more because other
recent initiatives exploded overhead inflation to more like 300% and maybe as
much as 400% meaning merely 20% residual recovery. So much for the collection
collectives trumpeted 99% delivery ~ their long term average achievement can’t
be any better than industrial standards of 40-60% whilst those with careerist
captains converting charity into campaigning via retail pop style advertising
are quite possibly burning another 20% on their motivational messages, meaning
again only 20-30% fraction for frontline functionality.
I’m undeniably a going-on
geriatric grumpy old git so maybe that’s why I can’t see sense in all this
squandered silliness, likewise the opportunistic putrefying poppers endlessly
bandwagonning their dotages on the back of emotional good-doing to financially
blackmail their blindly bland bands of boppers. Doesn’t matter if what they say
makes no sense, not when it’s all about converting kids into conviction
carriers. Doesn’t matter when the good (god?) Sir (soon Lord?) Bob G says
(Toady BBC-R4 4Jan05) that the Asian tsunami killings were an unavoidable catastrophe
unlike the African famine ones ~ doesn’t matter that his truth economy was so
economical as to absolutely opposed to it ~ doesn’t matter because the studio
fartaries didn’t question his lie despite it’s manifest contradiction of
reality truth that has been known for 50+ years, reality truth that has been
Pacific lifesaving since the 80s. In sum, it doesn’t matter because McLuhan’s
medium really has long since become the only message that vox pop can perceive
and sod the Titanic of exhaustively texted and extensively tested reality truth
that sadly sunk without trace soon after science was sacrificed to
post-scientific pressure-group politico populism and crucified in the cause of
cultural correctness coercion.
I blame Bill Gates because
it was his Powerpointless product that empowered primeval plods to produce
promo pap to the extent that PPTlessness is now a universal vox pop pulpit for
all virtual truths regardless of absence of any anchoring in reality truths.
Even more I blame Bill Gates and Walt Disney taken together as the terrible
twins of PPTless cartooning that iconised virtualised motion imagery thereby
McLuhanising false into true for everyone apart from handfuls of going-on
geriatric grumpies who remembered reality truth only ever emerged after
exhaustively tested verification, never merely intoned against a backdrop of
superficially asserted prettification. Although this diatribe is generic
philosophical criticism of vast real resources squandered on specious virtual
e-science as cheapskate substitute, it’s particularly pertinent in the current
context because tsunami terrarism provided a paradigm for the idiocies of
imaged ignorance manifested in not just the Beeb’s Megatsunami Horizon
(criticised above; repeated BBC-TV2 11May04 with amplified hysteria about
impending doom) but also that Hollywood blockbuster unseen by me but am told
portrayed a comparably ill-conjectured CO2istic catastrophe which was
extraordinarily eagerly endorsed by HMG Chief Scientist (Independent 13May04)
as educational enlightenment ~ especially astonishing for not conceding his
expertise in chemistry was substantially overstretched in scoping to tsunami
stuff, also even more for not declaring his original UK academic residence had
been UEA, one of the founding anti-CO2 crusade hotbeds campaigning ever since
in pursuit of percy’s pennies to play apocalyptic pastimes.
Anyhow, recollection of
these sillies compounding my irritation with unabated mediarised inundation
(ongoing idiocies like the one in today’s Toady reporting apparent surprise
that a fisherman at sea hadn’t even noticed passage of the tsunami), I thought
to do some simple sums for myself ~ nothing new for sure but to content myself
these things really were as envelope-back do-able as I had always assumed since
doing the basic books decades ago. Sure enough seemed so, so I decided to
summarise them here because they seem entirely consistent with was had been
reported (including a Toady remark that injuries were comparable with road
accidents) ~ as well as leading me to wonder yet again why no arrangement had
been put in place providing for rudimentary relay by telephone and / or
internet from any of the major earthquake centres to any of the local
communities allowing alarms to be raised by flags and / or sirens in the
several hours elapsed between any R7+ event and arrival of any tsunami
triggered by seabed displacement.
It never needed any
expensive systems such as have been mooted even as modernisations of the
Pacific ones ~ all it ever needed was awareness of the potential hazard (well
known of course), willingness to swap names and / or numbers and apparatchiks
charged with clearing communities away from the shoreline ~ and not very far at
that, well less than a kilometre sufficing for dispersive dissipation even over
uninterrupted stretches of flat shoreline. Clearing people, carrying even, to a
kilometre inland from beaches doesn’t need more than an hour warning ~ so seems
a pity of monumental proportions that Blair-Bush bullshit bluster on antiterrorism
apparently never paused even to recognise that war on terrarism would always be
immensely more effective in terms of lives saved per penny spent from percy’s
purse. Indeed, the sickest and saddest irony here is that the need could have
been met from petty cash of just one of the vast arrays of agency offices now
staffed by hordes of apparatchiks paid to plan and produce policies purporting
to provide net positive public benefit On the other hand no-one with a sliver
of sense surely ever expected anything worthwhile from any authorities
associated with intensely intoned imposition of IDism as paramount priority
when only obvious beneficiaries will be purveyors profiting from imposition of
yet another correctness kickback culdesac!
Old-fashioned textbooks
always started with “consider” ~ so we consider simple sums associated with
solitons and shoalers as follows. As explained in basic books like those
indicated above, solitons arise from depth-derived dispersivity of otherwise
undispersive shallow water waves. For
simplicity select steepest soliton whose amplitude h as elevation above ambient
is not more than 10% or so of its length L which in deep water is supposed
similar to ambient depth H. A compact deepwater source thus supposedly excites
a circular soliton of expanding radius R conveying excess volume V of about
10R(Lh) where 10RL approximates (ie pi=5 say) averaged area of a
circumferential ring wave carrying averaged excess elevation h. O-level
clever-clogs know this ring approximation is adequate when R>>L.
Better, to minimise
confusion let’s use as numbers an excess volume V of 1km^3 (cubic kilometre; ^
means exponentiation), that is one billion cubic metres (= tonnes) or one
trillion litres (=kilograms). Loads of water then but then loads are needed to
get a soliton excited on deep water with representative depth of a km or so ~
5km^3 (pi=5 say) is needed to fill a cylinder with radius matching 1km depth.
Deepwater solitons travel with celerity (speed) C about root (gH) where
g=10m^2/s is gravitational acceleration ~ about 100 m/s when H=1000m ~ about
200mph which is where the jumbo jet mediarisation came from (400mph = 200 m/s
needs 4000m depth). When excess volume V of 1km^3 has reached a radius R of
100km (taking 20 mins at 100m/s) with wavelength L=10H on same ambient depth
1km, its amplitude (excess depth) h=V/10RL is only ‘0.1m (10 cm) or so. If
radius reaches 1000km before the ambient depth diminishes shoreward, the
soliton’s amplitude by then has declined to just 1cm, no more than a ripple or
rather a long swell albeit an express one travelling at 100m/s but conveying so
little impulse as to be barely betrayed by its 100 second transit beneath any
boat or even a swimmer ~ so the wonder
expressed by Beeby fartaries in response to the fisherman’s tale must be down
to impressionable susceptibility to Hollywood / Horizon hype born of brutally
indolent ignorance as to how virtuality might be gauged against reality in
judgements on plausibility of true truths.
Okay so now to the shoaling stuff,
old hat for old-fashioned analysts and contemporary computerists (for former
also usually instinctive insights, for latter often only cartooned
caricatures). Under the long wave approximation excluding vertical
accelerations as negligible compared with gravity, both solitons and shoalers
sustain their approaching amplitudes, exhibiting their awareness of decreasing
depth in stosses steepened to extent of becoming vertically fronted shocks /
bores trailed by declining slower lees, with the frontal shocks located so as
to conserve excess volume.
The details may be almost
trivial for aficionados but pretty indigestible for the uninformed so as
simplistic simplification I’ll suppose the wave selects a effective transition
depth at which it ceases being a seaward shoaler and becomes a landward
intrusion. This notion appears naturally from flatness of response of celerity
scaled on perturbed height to the ratio of ambient and excess depths ~ unlike
its response to the ratio of ambient and perturbed depths as usually formulated
in books on mathematical hydraulics. Symbolically then (see eg Stoker) with C
proportional to root (gh) the celerity coefficient (H/h+½)(1+h/H) equals 3 for
both h/H=1 and h/H=2, indeed pretty much 3 for all in between (viz 35/12 for h/H=3/2).
The differences are immaterial for present point-making purpose but note that L
scaling shifts from H to h once the wave becomes an intrusion so with L now 10h
the intrusion height h = root (V/100R) or root (10)m, say 3m or so for our
illustration (remember pi=5 say) with V=1km^3 (=10^9m^3)) and R=1000km
(=10^6m). With this set-up located where ambient depth was anywhere from ½ to 1
times h we are talking about a wall of water apparently (ie H+h, 3 times
ambient H) 5m or so with the excess volume (height h=3m, length L=30m)
travelling at celerity C = root (3gh) = 10m/s or so for the 3 sec or so of its
passage past the transition station.
Awesome assuredly and
devastating definitely ~ 100m^3 per metre span equals 100 tonnes per metre
span, equating to somewhere between trucks and trains ten foot tall all arrayed
in an unbroken line abreast along the entire coastline and freewheeling
landwards from starting speeds of 10m/s (20,mph). No surprise then the injured
were said to look like road accident victims for that was pretty much their
exposure. So happens as a kid in Eastbourne I had firsthand familiarity dicing
with danger in red flagged waves even to extremities of 10 footers that more
than once nearly squashed me whilst surfing in scary stuff sheeting to 30 foot
on Splash Point’s seawall ~ but otherwise doing no damage apart from the salty
mist rapidly rusting old-fashioned Brit cars. And there’s the nub ~ in those
days we still sturdily supported Victorian protection policies and readies were
released to repair and rebuild even these sensible survival / safety solutions,
not merely prevaricate on Powerpointless promotional prettifications.
As easy extension we can
even estimate the distance of damaging / dangerous displacement ~ at least as
phenomenological forecast if not exactly physically principled. Supposing the
waterwall travels initially as a 3x30m solid block at sustained speed of 10m/s
then 3 seconds after landfall it becomes beached with its front 30m inland. Supposing thereafter its front continues at
the same speed but its backend bottom stops so its section deforms into an
area-conserving stretched triangle trailing a shrunken rectangular frontend
with maintained frontal height and speed. After another 30m (3 sec) the
rectangle has been gobbled up into a triangle 60m long with 3m tall front
tapering to zero at its backend. In the spirit of rudimentary but
well-documented box modelling the front would then be supposed to sustain its
shallow-water speed root (3gh) whilst slowing so that area-conserving height h
declines eventually to zero.
That’s a trivial exercise in
modelling mathsturbation but for present purpose it suffices to see that a
frontal residual of 1m travels at root (30) say 5 m/s (10mph) or so and that’s
pretty much the same condition as “safer-speed” roadies regard as threshold for
injury inception ~ not saying I’m a supporter (indeed not: see my meldrewisms
on these mantra merchants), simply saying it’s an adequate analogy for present
purpose ~~ and more on this bit below. By the time its front has shrunken to
1m, 1/3rd of its initial height, area-conservation (90m^2 or so, initially
3mx30m rectangular) means this triangular thing’s length stretches to 180m and
that’s exactly what we wanted as indicator of the risk range ~ not 20m, nor 2km
but something like 200m because it (astonishingly?) accords almost exactly with
what the victims reported and with what the telly coverage has recovered ad
nauseam.
Moreover the time it took crudely estimated from the implied
average above of about 8m/s (10 dropping to 5) for its final 120m phase (ie
180m total less 30m initial block motion less 30m triangular transition), that
is 15 sec, added to the initial 3 In block motion plus 3 in triangular
transition in all is about 20 seconds meaning only Olympian sprinters could
have matched its motion, and then only just! On the other hand most able-bodied
people might manage 200m in 30 sec, certainly 40, and that means anyone who
spotted this thing 10-20 sec before landfall, that is when it was 100-200m out
to sea ~ and moreover recognised and responded by running the right way in
response to its signal of impending doom for all who didn’t.
All of this tallies pretty
precisely with the events as portrayed and all of it so simple and so well documented
in the learned literature ~ not to say done a deal more dutifully although
maybe it was scientific sophistication that proved to be the overwhelming
obstacle against any anticipatory actions by any politico pontificators
anywhere. Politicians and apparatchiks have increasingly sought to shed
responsibility by increasingly asserting it’s for scientists to make their
methodologies more mundanely meaningful and this time there’s been exactly the
same old bluster from them and their mediarisation mates. As ever they denied
self-evident truth that whilst science still possesses an overarching
imperative to reflect realities as realistically as intellectually attainable,
its role as has ever been remains to reflect and report ~~ but its
responsibility stops a million miles short of self-destructive sacrificial
striving to stimulate sufficient cerebral cachet in these intellectually lazy
loonies who may manage to mouth mantras but not a lot more, indeed increasingly
it seems exactly no more than that!
The truth was out there
since a century ago and any alleged denial of understandable accessibility was
down to self-serving self-denial. I was gobsmacked to hear a Toady host even
dare to suggest that the USGS earthquake guys were to blame for not notifying anyone
as soon as they had registered a Richter 9 ~ like the man said ~ “Who? Where?
How? Boxing Day?” No: the blame (as ever) sits squarely on the shoulders of
those charged with safekeeping yet (as ever) chose to ignore the moral
imperatives incumbent of their offices ~ or even worse shut their eyes and ears
to everything apart from “expert advisers” advocating economising expediency.
Now of course it’s too late after the event so they’re all vying to outbid each
other on fulsomely futile gestures of generosity ~ and yes, of course, an early
warning system (ugh! Hate that word) must be put in place pronto as paramount
priority even though it’ll likely be only an exorbitantly expensive
extravaganza (excellent kickbacker though and all of it pinched from percy
public’s purse!) considering that with hours available everywhere for everyone
that could conceivably have escaped, trivial telephony or internetony in
precautionary response to >Richter7s say would more than suffice for alarms
to be raised rudimentarily but still sufficiently as red flags perhaps
supplemented by simple sirens.
Flagging at local costs of
£K per kilometre would be / have been costing only a few £M or so to
cover all populated parts of the entire coastline and local officials would be
/ have been vying for to take charge from sense of service never mind gain
or more realistically from sense of gainful service. Wouldn’t that have put
refreshing reality meaning into the precautionary principle sadly so
discredited from its abusive misuse by opportunistically conniving politicos
across the board in pursuit of their ponderously preposterous propaganda on
CO2ism and IDism, indeed endless IDIOTisms. But no ~ in return for all of the
massive amounts of soundly scientific gestation on tsunami terrarism their
responses have only ever been somewhere in a spectrum from gesticulation to
gesturation. The EC alone must have splashed well over £M100 on deep blue stuff
over the past 25 years, doubling it might include national budgets and then
trebling the double might reflect worldwide willingness to have whittled away
percy’s purses on wanton woolliness ~ yet all of it in the end purchased just 3
minutes righteous remembrance! Commercials of course are queuing up to capture
chunks of charity carcass on superficially sophisticated systemics that’ll be
set to be stay silent for a century or more and were never needed in any case,
not with phones and flags sufficing when hours will always be available to
raise alarms.
Talking technical again,
another awesome analogy as follows. 10m/s of 3m depth water conveys energy at
>100KW/m so every 10km fetch briefly rated the power equivalent of a large
GW electricity generating station, indeed on areal basis of 30ha (10kmx30m)
delivered it even at comparable intensity. Tempting also to wonder about
extremities of the earthquake’s epicentric source zone. Well, a minimum initial
elevation can be guestimated assuming conservation of excess energy as well as
volume ~ that is, equivalent to gravitational collapse of a stationary column.
Supposing (as deduced above) the shoreline bore travels as solid body at excess
speed C, height h then it possesses kinetic and potential energies summing to
2Vgh corresponding to an equivalent initial excess column height of about 12m
(=4h) with radius (from volume conservation) about 4km, both plausible and
consistent with assumed compactness. In
reality detonative drivers are exceedingly dissipative with perhaps no more
than 10% converted into coherent solitons but then the disordered initiation
sequence would also have engaged a substantially bigger volume than the excess
residual adopted here so we might envisage no more than twice the presently
deduced height and radius ~ even so, an explosive eruption 12 to 24m tall and 8
to 16km wide (diameter) would approximate Armageddon to anyone unfortunately
around at the time!
Of course inland intrusions
are also lossy, this aspect also of their detailed behaviours well documented
ad nauseam in learned literature extending to descriptions incorporating role
of bottom slope in reversal of energy via fractional reflection into seaward
bores not to mention design procedures dating almost from Victorian times for
sea walls, steps, groynes and beaches as reflectors, impactors and roughness
dissipators. All this has been known and had been widely utilised until
relatively recent reversals arising from almost universal intergovernmental
opportunism on economising moratoria that suspended strategic solutions sourced
from soundly scienced industrial engineering for sake of service sector
solipsism that soon spread into ecosim, naturalism, organiscism, wildlifeism
etc ~ pretty much purveyed for purpose of personal politico promotion by a
plethora of noNGO poseurs and their equally uninformed manipulative mediarisation
mates in alliance to exploit susceptibilities of gullible goons in the
chattering classes simply to bolster their burgeoning bandwagons of blandly
bantered brickbats against anything purveying profoundly principled purpose for
profitable practicality.
Not so long ago the flooding
fruits of these futilities were endured on our own doorstep in the inundation
endured by Boscastle, at substantially smaller scale of course but still a
scary story as seen in Beeb’s recent rerun. Boscastle’s fate was equally
attributable to abject abdication by agencies abandoning their provision of
preventative precautions even to extent of simple stuff such as clearing
culverts that inevitably become choked, more by nature than by man ~ ironically
of course always in the name of allowing nature free run to reclaim what it
once ruled. It’s not just the elementary avoidability of these calamities that
really rankles with those who endured them at first hand but even more the
highhanded haughtiness of the people holding public office nowadays more often
than not pompously presuming power as graced favours from their friends in
London Luvvyland and seldom suggesting any sense of service as reciprocal
requirement for their substantial salaries and pension perks,
I had firsthand familiarity
with this damaging disdain in the despair of a then recently bereaved elderly
relative who was irreversibly inundated by the millennial floods, meaning only
option was to sell for a song his house that had been his happy family home for
25 years or more. It doesn’t take real risk of death during these events to
destroy love of life, ~ knowing it was avoidably down to institutional
inertness can be enough, especially when none of the supposed support sources
shows even slightest suspicions of sensitivities for the plight of people
pointlessly persecuted by their pomposity. Saying sorry isn’t any substitute
for solution ~ not with adequate answers already on the books for a century or
so and especially not when their application was abandoned for economic
expediency covertly cloaked in the name of nature as god! Indeed, god only
knows what’ll happen in East Anglia when the woolly wetlanders have had their
way and abandoned all those sea defences for the sake of wildlife whimsies ~ oh
yes and save substantially from the suspended spend. It’s only 50 years since
that calamitous 100-year inundation and North Sea offshore records have
repeatedly shows these things have never really been persuaded to comply with
expert opinion on full term returns!
It’s been a similarly sad
silly story in the Bengal Basin ~ ask the Bangladeshis about internationally
promised millennial sorting of their annual monsoon swamping! It’s been 20
years since Reagan-Thatcher revolutions swept away senses as well as sensibilities
and I can’t see any hint even on the horizon of any escape from the now
internationalised ignorant inquisitions by corporate and cultural correctness
cowboys criminally commanding coercive compliance that has long since driven to
despair grumpy old gits recalling that true realities existed before false
virtualities, in a world where highest individual factors dictated decisions
not lowest common denominators! I imagine bagfuls of bad news were buried
beneath the barrels of blustered bureaucratic boloney about this latest
“natural disaster” as if it had somehow been inevitably unavoidable. Enough
said ~ far and away far too much indeed!
Carlisle’s calamity so closely coincided with
prognostications as portrayed for gloomy doom on our own doorstep that an
additional envelope-backer was inevitable! As elementary aid to setting scales
consider that mm raindrops plausibly fluxing as one per cm^2 every 10 seconds
dump about 1cm depth every 3 hours (10Ksec) and 10^-4cm^3/s/cm^2 (cc per second
per square cm) equates exactly to 1m^3/s/km^2 (or cumecs per 100ha). Maybe
typical of urban rivers would be 30m wide by 3m deep, say 100m^2 or so
sectional area, with maximum speed perhaps 10m/s (20mph) or so
(Boscastlean-style extremis) meaning maximum urban capacity 1000m^3/s (cumecs)
~ consistent with mediarisers mundanely mentioning flows filling Olympian
swimming pools (50mx20mx2m=2000m^3) in a couple of seconds.
Three hours of rain is
almost trivial in NW England’s Lakes region, indeed anywhere near Manchester as
I recall from my excellent residential decade in the sixties. Ten hours though
would surely have driven doubts as to whether it was set to be monsoon misery
whilst 30 hours unabated would be more a Bangladeshian big-banger than
Mancunian plas-maccer! Loads of water, then, indeed as reported some 30cm
rainfall or about thrice the raindrops basis suggested above and in the event
enough to submerge the city and immediate surrounds (maybe 10km^2) under a
metre of the stuff ~ meaning maybe 10km^2 was inundated to that depth from the
100Ksec (30 hours) of accumulated overload from all deposits dumped over the
complete catchment (as the floodists say).
How does our simplistic
(10cm) sum square with Carlisle’s sad situation from its 30cm stuffing? Well
with presumed Kcumec capacity the river should notionally accommodate a
catchment equivalent of a Kkm^2 (100Kha; 100ha/km^2), equivalent to a 20 mile
radius which perhaps seems plausible as operational factor in flood
formulations. If so, the 3-fold higher rainfall reality as reported would mean
that 2Kcumecs accumulated over the 100Ksec (30hour) event, comprising an
undrained volume of 200Mcumecs, equivalent to 200m/km^2 or 20cm when averaged
over the presumed Kkm^2 catchment. Given variable elevation especially in vicinity
of Lakes terrain, a metre of so settling in the top 10% risk strip along the
riverfront is must be deemed absolutely entirely as expected ~ and the
essential point here being expected on basis of just twenty lines (and twenty
minutes) of simplistically simplified sums without any recourse to any of the
navel-glazed inconsequentialia manifested from megamoney masticated on maybe
marginally more mathematically meaningful megamodelling (maybe because
conjectured characterisation of complexity delivers abruptly diminished
dividends) and its Powerpointless prettifications portrayed in webbed
wonderland. Sadly, not a lot of it has been spent sensibly on actually actioned
protection rather than promo papped pontification ~ just a sliver say £M10 (few
£K per home) would surely have slashed the top 10% risk strip to no more than
maybe 1% and thereby almost entirely eliminated Carlisle’s crucifixion on the
altar of EA’s ecosim etc.
One wonders how much
dispersive ditch drainage was dumped over past few decades in the name of
good-doing for nature so as to conceal covert cost-cutting campaigns ~
abandoning pre-mediaeval precautions for short-term saving whilst so readily
risking human wellbeing has been about as abject dereliction of duty as
anything on any administrative agenda.
Just thirty ditches 3mx1m equate cross-sectionally to our biggish urban
river, maybe 50 to match in-spate capacity so 100 or so would have accommodated
the 2-fold overload. 100 Is definitely not a lot when spread around our 100Kha
conceptual catchment: indeed at 1 per Kha probably pretty much aligned with
what was once sensibly deemed judiciously precautionary ~ not that pejorative
principle but in the proper sense of reducing risk actuarially assessed against
quantifiable quantities, not notionally knobbled numbers produced purely for
politico / political purposes. If civil construction costs of £M200 (70s
figure: £B2 now) plus dredged drainage at £M20pa can be charged without
contemplative comment for London Luvvies to stay safe, then surely population
pro rata 10% of these sums should have been assigned without any assignations
even to protect Carlisle’s people. After all, both cities even have
historically similar status ~ the difference as ever resides in denial of
demographic democracy to provincials perceived as plodders by our precious
politicians, not least regional quislings queuing up to collect any chance of a
decamping call to the centralised collective of careerist cowboys.