133 lines
5.5 KiB
Plaintext
133 lines
5.5 KiB
Plaintext
grass, hut iorussed by boliles or eurved glass. and
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welding, ellnpllre, and elgalerle aerldenrr. ln all,
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llghining and aelidenrs are perhaps only a or so oi
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ioral lrresl lhe vasl lnarorlry ale hr by lllisehieyious,
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psychoparhle, or even wellenleanlng people. A iew
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pyrolnanlael ilghl and allend rnany lires, and even
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enlisr ili yolunreer llreilghiing org. sakxons, m
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aborlglnal or rlloal peoples, an angry person will
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sorneonns burn oui asalnp or ioiesl
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FACIORS THAT INCREASE ms lN-rENsl'nr 0R
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SPREAD
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oilee inlrlaied, wlldlrre ean spread wr|h gleal speed.
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grass hles spread alrer hell am iarler ihe dew has
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dried om, lorelr oils horn rlildday or 3 pm. Alier .n
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inuial ilaleup, an hour or so surllees lo develop
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flmwrm wildxllons, alded by.
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. Lam hlels oi srlirller ihan o eili dlameler, grasses
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and silels, al less rhan m. wnler ronlelir is ehluilr ol 75
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x so lnln pine, unpainied, ran be weighed to judge
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liuoiidiiy and wood drynesl, where saiuraled, rhis
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wood is lodged ar loom. l-ine woods erupr ae less rnan
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m, hurnidiiy or mouluie sonierri due ro iugh luln or
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oil eonrenl.
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. Wlnds olhorii I060 loll/h areeleralesplead, as ihe
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square oi lhe veloelly. Lg, ar 20 lliii/h, ll
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ihe spread is 2 lon squared per hour, rhen ai so lull/h,
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ihe rare ll 4 loll squared per hour. Al hlghrr wind
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speeds, rorlgues ol lire break up ihe Illeilonr A| lw
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ion/h, ground rues iroysell-exongulsh.
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a mud; "backmg" lshriilngl late in ihe day may
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blow our . ills flank “no a broad lroril, or even blow a
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(lie back on lisell and lnalre ll saler However, oaelnng
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winds are unpredirrable, and in wlldllre rhe best
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srlniegy is «o order an early eylrusliori or a broad area
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ereepl ior reanls lln sale lerugesl whose rob u ls ed pui
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our lnlnrrr huuu In: in ihe illsl lulflmux alier ihe rue
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has [used Fur lhrs reason, iolesied suburbs need loeal
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refuges (gravelled areas wlrll underground shelm), as
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do lsolaled hollleiieads. and long sllelehes oi roads
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thmugh irularriniable loiesis.
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Midfile will always oellil oil and borders; rhus we
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need lo hlsi oe able lo live wlih lire, and perhaps only
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wwmianly lover a period or yearsl design lo ellelirde
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[HE horn senled areas by a combination or:
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o Alrering lne yegeiarion ia ereaie lnlne ole—ilnniune
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sysiellis
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- Desrgning danls speeirlrally lo noodrlow over
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hillsldes subyeel lo rue
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. Mechanical or glazing removal or ruels ills: belore
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breadallgel penedklhls lneludes dead irrirsh, long
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dry grassesand ihe dead lower bunches ol lrees,
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ln noll—llrhabired rleas, bolh “tool” rues (damp .nd
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eool wellherl and "hill" riles idry periods) are some
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lirlies lii es a llianagelnenl lliosair io preserve VHF
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dependenr llola arid 1auna;ihisls unsale and dirllruli
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lo miml, and ollen muses hles
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Houses, dense surrounds, village surrounds, and
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452
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iruown plannng lol lrle lolesls al rhe base ol sellled
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slopesl should all be deslgned ro lnlnirnlse rile darnage
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and inorialrly File an be expeeled al wlldhle on a
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lnole or less regular senedule ln specilk yegelallon
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lypes al aboui so years in wel selelophyll loiesl, Ho
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years ln dry slyannah. and even annually ln
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unblowsed grassland. Thus, rile prouldes a speed-re
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ploblelii lor designers and landowners progressing
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oooi grassland io lolesl operarlonl, From 3.5 years, or
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uniil (areal esiablshrnenl, ihe sysleln has hlgh hre risk
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and we need lo programme plarihlig oiosails lo iedure
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dislrlo risk.
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mean“ is a way or decreasing llle rlilensily,
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loads ICI as Illebleal, as do ponds, lnarslies, livers.
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srony aiels, and sulnlneregreen or sappy plani props
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hedgerows. Horirorual hrebleah weakens or iedirles
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ihe lire hunk energy, Veroeal lirebluak, lo preronl fin
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”auwmng" iri liees, re res on rhe relnoval or lower
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oranlhes, dead nee normal, and perhaps ml planllng
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sappy ground coral under ihe iolesr
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No rueoleah leyen in km or warerl ls eiieeilye in
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llleslorrns, as lire raniadoes, wllh aseeni yeloeicies ol
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up is 150 mm roll dr-Idup on ihe lee rrdge srde ol
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hills, iraselllng downhill and hhillg aloli large logs and
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braneher arid pieees oi houses, and clearing niassiye
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aerial gaseous explosions The ground winds near rhe
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base oi lhis rolurnli lsonle lens oi lnezies across) ean
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reaeh lno loll/boar and will roll people over and over
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The noise ls dealenlng
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ln lhese lornadoa, or in more nilnor whirlwinds.
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lMimitsflml riiaierlal is earl-red alon and dropped our
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ironl I40 kill dowliwuid ro srall ilesh lnes, and hesh
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nresiorln sequemfil igilre 5.2!.)
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in lowns, lire ll-slsranl desrgn (fur wildrirel has lhese
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Ieaiilles
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r a sllnple m0! and wall ouillne lno iniernal loor
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valleys or le—enrranr wall eorners io pile up lnrandese
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eenl ashl
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. No iarpaper ioor lining proreellng lnro guilers.
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loo! guuers should have erlher a leaI-rree prnllle, or
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can be plugged and waiel-hlled in ihe erenr oi lire
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(plugs are nandlly thinned ro ihe guriel near
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dowripipa) Rool spares olien alien alighl horn leaves
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ln ihe gulier
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- No unsereened windows. underfloor, or wall
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eairiry vull spares, all need nnernesh oieral screens io
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iudueesparlrsire Even beds ean enrrh ahghr wlrh large
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embers, and rellais or underfloor spares lliay have dry
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rilewood or lilel lloulds sioled lhere
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- No inflarriliiable dool lnars, nor wood piles or
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shrubs lgailrsi ihe house walls large earls ol perlol, or
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elplnslve rnaierlals, should be sioled in a shed away
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horn ihe housas, hghily hdded.
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SITING or HOUSE AND BUILDINGS
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ln sireprone areas, houses are ar lnosl danger irooi
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upslapr lire; lew houses suryioe wildllre on snarp
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rldgeiops, or ln hill saddles lhar have dlvrrgrlig
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i-ldgellnes nearing a wind lhlel rilnnel cflrd The sanie
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tunnelling nr illrensrllearlon oi lire ls ereaied by
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