137 lines
4.3 KiB
Plaintext
137 lines
4.3 KiB
Plaintext
”hwlnkmisriminplamspmts
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Wine lhe area is overgmed, lhe glgala beeollle
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mm lheaolonellr clays ween away and a m
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a nanny nuaunna evolve. ne area loses lnoal ol lu
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‘ pi. aral mm: unelable.
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noon-001$, GULUE, BADlANDS
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m ulkd llal-ouu, or m, «base ale (he EV!!-
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eeldlnual; flamh noolaol valleye rhey leave lhe hllla
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M"mull\s'lllufllyZ—8mdec‘pindlomwmm
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wide. bralded and gable wuer absnrbi eyel a wide
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— lal eueu plauu. Ovelyund, lhe auealnr nonlnlorlly
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ml elode aollle deepel channels, that become Shep
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galhee. AI lhls slage, divzriiun nl walel lroln gully
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bealda, wulel apleadlng holn laree cllnals. and gully
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plalaollg lllual be npplled. snull gullié can be lllled,
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and laleel gullia planned behind alone waua or gablnn
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bamdee onee rhe leed walel has been alvened or
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apeead (ngule lull.
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Connolllng gulllea ueerendally a nlaher ul:
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. llellevlng rhe oauua, lull-fly dlooe el overllae and
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ladr of walel eonbnl, and
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- Plevellung hllrhel eul-bukol lhe gulllee
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Fraglle sollr, leose shaley ground, and leeenl
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aedualelus eepuaed |osudden overland flow) may gully
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ln a [m downpoura, ln desemy Ihls llloel hequeully
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oeelm where looahlll llood plan» are avergnud,
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whele rabbis hlnrlel mm loose aubeolle, whele vehleles
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or name ereaoe downhlfl lacks, or whele eadly bull|
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loud; dueel met llow lo (uh/Ins lhal mill-raw now
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Such areas need lene-lng oul, llgm on no eloeklng ol
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anllrulla, le oonnnl, and above all, spmdcrbanks lnl
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lhe walel
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ln ule valleys above lhe gulllea, smam now eall be
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dlvened |u flood bpmidlr rhannels, and a eenee ul
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exp-hues drawn downulll horn the gully bank |uwin15
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lhe rlelges (sloping al l mm on sol. figure 1m slnall
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gu|li=s ean be bulldozed lull, or lluereeplnl drallls
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lllade m lhenl m an oll llow. large gullics ean also
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be find or narnrned ll soils ale alulable, but erlenslye
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gullkd badlalule ale we erpelulye m oeal ln lhla way,
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nd we nlay need In lall bull lo emu-lg small slll dalne
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in lhe valley flmn Ihgmsdvav
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A, wun muly dryland lmhniqun, gully lelehrlnn
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banks need In be arnall, Inquull, and wellrmide to
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eneellvely Spud now and eleale absorbenl [Ills whele
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walel cupped lrl nlre eleale benenelal erowlng ruedla
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lll lually aleaa, onee gullylng has developed, lhere lsm
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alrerneelve lo allowlng wlker lo llow ln lbe gully
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syjkms and m neale helde lhele.
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A eeele. ol wells as rn high lnps sedmmll 50 MAI
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llee ealabllahlneul ran rlablhre ule mnv". Wells ean
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be made llnln a aellee nlwell-bl-aeed Wale-men [mu-i
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all low none bands amss gully floors, or slmlbfillzd
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wlle baskets chlllublsl plneed lo splead lne flow Bf
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noodwalel “SI"! 1113,
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U lhe wells are hlellel lhan as nl ll )5 neoesaaly lo
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pmvide a rplneh aplnn ar lhe lool ol lhe well whele
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plunge poola lorln Howeeel. nleleeplor banks an
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be made above lhe sully/Judy Ind waler dlyerled,
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lhen ehe lower volunl: ol flow Prnlu5 ways at I34 5
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ln hlgh wulloul scan! damage.
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All well: are suned al lhe gully nude, and bull ln
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sequlmr upilveamy Whele no local aupply ol bouldel I5
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available, «he lawn helglll ol wells ale bum n! wile
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lnelh only, Where lhele are plenlllul Hunts, slone
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seepage Wllrs are vuy satiflanury and lorrn loads
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moss lhe gulllea
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Wan mu§| always ealend up lhe gully aides, well
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above any [land level. 5lnne wells are lnere easlly
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malnlalned and .eunred lhun wue leneea, and male
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pennanenl. A|I walls need Velhler gm or some such
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rough planl balrler lo hold eloelon
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m pm such is lhal al Asnnlada lCape Veldel ln
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rhe Sahel llllrerlullulllll Agnellllnlol Dueloplllelu lan/Feb
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I955), lance—bulldlng and check dams bulll ol
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alone-ruled wlle lneah gablnlu m lhe urealn beds have
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elleellvely eneelled and nahlllsrd soil eldelon nnln
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help My absorb runoll wnler A (hilly.- llorll sugar me
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elnpplng lo {11: nnd vegeuble eulluee aha aaelala aoll
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musen'znml and alda 10a! nulnhon ln lhla area nf hlgh
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“Mmyhymtnll Some 2000 ha have been leelalrned lrl
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lwo lalgel valkys.
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I’igzon pea lclllmr cyan) has suprlied lood and
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glvurua cover, and cooperlfiva have mud in W
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and markel lnod, h cledll providzd lor (mp
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ploduellon Wdls and pllenea dug In lap prourldwalel
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1o,”
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_ Inca
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name)
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FIGURE 11.1:
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GlEEER DESERV m wmnnows
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Slnny flmn mudmua xlnb—asl nmml are uelnllll llea sues,
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W mu lmllmea mum on onmnu! naulull; llela imam
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2’53:
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mean alumni: mnmm as lleas all needed In lam-m um
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333
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