146 lines
5.2 KiB
Plaintext
146 lines
5.2 KiB
Plaintext
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when il does nears QUANMS have been used
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lhe Middle pass ioreonnil-ies lo lap aoniiers [Finn
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whim areas were ion-sled, unyared, uncuhwiled
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.al lashed she hard payernenls oi loads and settle»
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lilue run—on oreurred and lhluughflnw in soils
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sirearns (lowing. Deseslliied aseas lad: shese
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lerlslles, and WI: need in mknrde in she
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“mlnglcal syele lo slore,l lrsale, and eonyesi
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males lo vegeialive 5m|h— n shori, lo ereole soil
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up lo aasrsi tones maznmmn.
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mmw'loN
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minim“ oi wales and she osne ialsen lo lniillsals Ls
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moi rain iln hoursi
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- 11—7 min/hr minlmum ln sands and dusl iloessi
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2-3 hours.
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. 4»! inrn/hs minimum in elayeloarrss iszil hours,
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at
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- I rnnl/lls in a|kalme swelling elays 2i hours.
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This hasqlrile a iew ilnpllralions ios us, ios ilwr ean
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spread nenisal or acidlr sands aoous 0,5 in deep as
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more aver alkaline slay pans, lhen we have an exoellenl
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sosiase lo illsl lnirllsale and lhen hold sarn, and
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soroequenlly a good porden or lree silo, on whieh we
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eansiore up lo i moi wares ios lung periods. Thlselled
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oeeurs namially as she disdurge end oi some guHu-s or
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anyons. ’
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Annlhe‘r way lo ichwve llus is lo open dwp swales rn
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a||<allnr soils in iioru oi sands and gravels on lhe move.
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and lei lhesn ml in many areas, people hare lwllh pleas
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labour) hnrred layers oi slay, plaslls, lhlel solloidal
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green malles lglzyl and las or laser under lhe deep
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sands oi lhers gliders; on mkbmadssnle, dnlmsc sins
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are loll Every Ion—2m in in shore syslems ll is ohvrous
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ihal we rised so hold wales lur a day or more ids u so
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sank Il| lo soils
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SLOPE STABILLSATION FOR [NFILTRATION
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splniier or polmpmhqu grasses help so slahilise
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slopes and lnerease lniillsalion, [arming muss-slop:
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sand daols as lhey 23!, the normally simulas lossoels
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iorrn breals open lo crease an open risen-l lls horns
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uphill Delsrius iosms deeper sandy suhole hulk:
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oelund lhese lunulale dumps, riieeliyely eroaline ll
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awale, Burning dlsooys lhrs oiled and allims sudden
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xlnpe erosroil lo oeeur
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However, we earl crease suzh inirlllalion aids as
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swales, wads dalns. levelled galdms, and soallagl- pris
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oi lheso, lhv: smair ls moss easily (mind on a large
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scale, our wadl dams may also wnsls well ios [ml iood
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ioresls; neuhes are a lnniole ii some oasis niaehinery ’5
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available, in sold deserls. lussoeh grosses and mosses
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prrfum lhe same film" ios unsialale iosll slop-s and
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soil ilows, and erosseslope Veiiyes grass lines on
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eonlour gmlily asslsl wales inilllsaslon and slope
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aalnlily.
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FLODDWATER HAllvanc
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Abariginal Auslrallans (Sleyenson, imi made
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earlhwall noodwaser darns lo rnslesse lerum gnu:
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and lheis wadi as did lhe I’Ipago and neighbouring
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gmnps in lhe Sonosa mglulls oi rile USA (Nabham,
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Wm.
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lhe lanes gully: worlled on rim flmdrphim and
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dollare deposiis as lhc mmLh oi wadis. Naoharn noles
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lhe iniesesuns iall llial alihouph surnrner slorslis hung
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«Lam oi wales, llroy add only lsv. oi lhe NIH)“ lo
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snainsrream soseoorrs Mosl oi lhe run—o“ ls loeallsed
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ln miennillenl sirearns, and only ayailalole ior loeal
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headwales agnulllum. Abmfl a sin oi sain is needed so
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Ellie useiul mm“. m a salshmenl area m7 limes
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lhe area oi ilelds. Hardy erops suell as mlghum are
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plodueed wuh run-on only 4 limes lhal oi lho iield.
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Mung lhe Colorado lilies, floodplain iirlda were also
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eonslrneled ios rnaior iloods Tedlmques roves [Elm
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posary oasisis, irsipalion canals, and iield houndar-ies oi
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ssone and easih relniossed wiih posis, orush. and
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vegcfilion. named and wild or weed spears are grown
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wgdkwrisampmnplzxavu4hamlcsperfleld
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The syshern is pass oi lhal lllirrnased in Figure mo,
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and needs mlninlal numgemenL
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As headwaler slieams eoalesee and enles broad
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vallzy syslerns flowing oils oi lhe 111136,th lalalded
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nyess idry inosl oi lhe yeasl break our .eross eounlry,
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dmpping sill as rhey do so, and killing lines oi organic
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muleh ai lheis highwakv level This isnsluie 0! seed,
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max-luv, twigs, rrrollnos, and debris is oreellonl garden
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nlalerlal and em he lsapyed uslng a seoueme oi sinus
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smop lures (figure moi ios use in galdms
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Whele lhe land hooded is ilallrsh, a 'gndelmn' oi
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low hanks loops lhe iloodwales and sills serlled and
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absorbed slleh grids need oanlo only n54 rn Ingh,
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and lhose are besl siahliised by slone on lhe upsliearn
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side, msmck glasses or laugh low shrubs, |lv9>ael
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shrlss and hnrrm os an he made oi heavy roell walk
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isom lhe olairl river lied Such syslems ln Papagn
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lndian areas in lain high levels oi lhe inaios plans
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nulritnlsr and were lhe hasls sii lhe sieh Nilolis
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will".
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When and as she slves iloods. iields oi rnlllel,
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mhum and legumes ran he hioadeasi sown inso lhe
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wel sill, and iales headed as slosed my ruslhes away
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irorn lhe maln siream, oroodes sleep dykes will hold
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waiess ln narrower and deeper ehannels ios nee erops,
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and she llees should ovesshade lhe deep aosospiion
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swoies so dweloped,
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BRMDED mums
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A dose ssuoly oi bfllding paileols in slsearrls, and in lhe
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assoelaled 'ngI' areas oi Vegan-ion, shuwlng up as
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darker areas on a hlasls and while pholo, reveals lllal
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their is an inverse ielalionship helween lhe land areas
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welsed or salusased and lhe shannel widsh, 5min
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rnulslple ssrearns ploduee rnrreh Iargu wened areas
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lhan simple main channels iriause 11.3mm. Th5
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susgzsls an is yes unisled slsalegy whese iln dry
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349
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