143 lines
3.7 KiB
Plaintext
143 lines
3.7 KiB
Plaintext
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nm ",3
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PRECIPITAYION INTENSlTV
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rum/day EXAMPLES AND PHENOMENA
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mo Lrgnl dew: 10,3), llgm rams in
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semr—and aleas w, orarne lama
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(a). TM smallesr nlls commence
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"VA! 3! 5-l H mm.
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All day drizzle 112), sneer eroslon
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can occur at l3, gully erosion can
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develop al 15. Dlversmn dralns in
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fils1 and second order streams wlll
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llow. Typical ol rams ol numrd
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ooasls, warm lrorrlal air masses.
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2\»50 Typical el monsoon sloud streets
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on coasls, or lipnl ram all day m
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weslern ma me olrmaleo. and
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pounds 0! oonvecuonal raln m
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deserls
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51—100 Th! candansallon 0le "or"
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onshore legs (so mml, lrooleal
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rams exceed loo mm once a year,
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100400. Heavy ram all day. and exceeded
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once a year on monsoon wasls.
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lrddawind coasts. Exoeededonce
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per century rn lemperale manllme
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areas,
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Milli n I
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RUM—OFF FRDM VARlOUS suasleEs.
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v. RUN-OFF SUBSTRATES
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a coarse sands. Active dunes xnd
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dunes m dune seas.
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5 Foresmd.
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lo wooded and grassed areas, russodr
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gmssldna
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l5 Culllvalad sands and sandy learns.
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zo Applalumau Average Ilgum lor
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sow-and and and areas.
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25 unmixed sreoon ol mind shrubs.
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ldros. gram:
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:lu blamed and whlvalad clays Ind clay
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loams.
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50 sraoo. and almmland grazed oy
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wad ammdle
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5n Undumed clays. claypansmbarl
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maflsd area
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all Skelflal souls and whit-d
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vagelallon,
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70-93 Compound rolls. seldom sous,
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non—wemng sands, anamm paved
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areas, lull wally srorsw.
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rangelands, mmfldccmses, However, n nsas rapldly
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as perennial prime or lusiock grass u ln nn-n replaeed
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by hunu ground or grazed-our areas wnere only
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Ephemls on annual grasses ean flmn'ish. surnrne nl
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elump grasses, therefore, lras a sudden elleer m
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mausing walee omen,
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- SEASON Runwolf has us mosl drsasrrous and
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eroswe elreas arrer long dry surnrners, hmdsc-ll: mes,
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exlenswe aulumrr or spnn, cullivatlml, and .n leer
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supsequern lo any period ol slress on llre landseape mar
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reduces vegzhtive cover ll rs a| urese periods rlrar
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“unmasms more gullrea, llood man sells, and cause
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|M sell collapse do. an aeaee sakzd sorls,
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- Almrlculm SEALED AREAS. Roads, parlnng
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areas, noose rools, hare nxk, eonereled open dnlns,
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and sompaeled areas or senlenwno nll produee naslr
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Iloods m nearby sneonns rlre areo ol rnese lolal run—err
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syslems rn earslrmenl musr be ealeulaled rr ededme
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fined mardarwn syslerns are lo be planned
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- so". AND ROCK WI’E m cATcl-lMErx-l, naprd
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rornlall mulnallon oeeors only m coarse or open sands,
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sandy loarns, knuwums ldeep, wellelnrerured sods),
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and soils with lanes or more nnrnos wnmnl None
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were-n5 sands. sealed elay souls, compaered sons. and
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sheer mzk or mush/e mtk domes all shod waler
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3M
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rnprdly Alusolmh lype need lo be mapped or noled
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m llre althmm under sludy,
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Gravels and bouldereloanks. rlrallered Mk ndges.
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uneonsolrdnled ptdlmem wasres, llmeslone oulerops,
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and eroded lold ass all an as rnlake mos lor lq'llllels
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These wll] remain open and reduee nmeorl unless us
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an happen in deserrsl, une blawn duals and sands
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eury rho-(revues and boulders, or wash down rnro lock
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erevrees lo seal llre aqurler lnrakes. OM: rlns oeeurs,
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spring wrll cease ro flow and warhnd water flow will
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rnernnse
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- 1-le wnellrer as a resull ol well~disptrwd and
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lowemeensrry rims (I-2 ern per dayl, or or lmpedlng
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surlaee laerors suen as tusmck. lrller, pebble, m arnneal
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pmillg and eomour banking, waler wlll mak lneo soils
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wulnoul run—0U over perlods ol {mm so mrnules m
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sands, and lrom 3—4 days in day-ham“ solls. Thus.
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wt need larger anificial amuse apathy m elay arena,
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ur we rrsk dmwning plane m hollows av" me perrod
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ol mhllramm. Mosl planrs ean warnsrand 2-3 days 01
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noodurp.
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Ideally, lsosl olanl promo resulrs lrorn 11,54 2 m of
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sanuared sod, and lnallmron roles olurlsdepllr should
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be rlrned m . prl mm wened, lhen lrlled lo (ask
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rnrrllrrnon umel so um um doprl. 015ml rs wmed rn
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