135 lines
4.9 KiB
Plaintext
135 lines
4.9 KiB
Plaintext
sueh ellerrs, lhen quickly esrablrsh nanonal loresl and
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walershel manager-1m! or uslorallon oolroes based on
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sueh mareh For ourselves, as designers. lhe proper
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appmach lo lnnd plannmg rulers rhal we reeommend
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oermanenl luresls and rho oreservanon 0! older loresrs
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on cmssrva'md ridges, and un sleep |l Inpe or morer
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sea-lacing slopes nle pleselvallou ol alpine or uplind
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absmphon areas lsalso essenllal
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SOIL STORAGE
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Soil nandmunlng ur nipping“ lsee chapler sr,
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pruvxdmg lr louowed by «lee Planlanon, lrare
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elemenr additions, and a nundeslruellve agneullure ol
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wellemauaged ualural yields, sparse grazlng, and
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ronservallon larmlug eenamly mereases lby larlors ol
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up ro 70—85%) lhe ablllry ol solls lo hold and nlllrrale
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warer, Areas ol up lo 35% nun)“ ean be eonvened ru
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rem overland flow by a mmblnanon ol soil condihmr
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ingswaleand wakvsyludmg lo rolesrs,
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As solls can ronlaln rnany nmes lhe waler ol open
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smxages or slreams, rhen bolh lhe thmughlloM
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baselluw, and waler avallable lur plans also luneases.
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ll lollows lhar lhe CYCL|NG ol waler vii
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evapolransplrslion and ralnlall also increases, Sol|
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lrealrnenls nuw need lo precede rree planlmg over
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almosl erery area rhar has been used by ronrernporary
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Igncullure lu parlleular rhe barren areas used lor
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eons-am rmppmg ln drylarvd areas need soil llearrneul
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ro rnrlrare wa|er absorplrou Trees are essen in lo
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Prevenl waitrelcggmg ol sulls and soil sallan m m:
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long renn,
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INHLTRA‘HON vm mmlwoxxs
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cheap bmadsule eunhwork syslelns, and many minor
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lonns or eannwurks can ald lhe rnlslllaoon ol overland
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waler flaw. l-m'lNG, SWALES and WATER
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SPREADING are rhe mam aids lo genius lresh walorro
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deeper srorages lur longerenn use, and also lo incense
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base (low Diversion ol rurlaee flaw lo sand basins,
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dune llelds, swlmps, and Suakage beds m
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eanh—berrned fields all ensure residenl waler “serves
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lor my and oees, and longudeml slough-s lor use in
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dry seasons
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Diversion dlalna and lheir assoeiarad valvra, slldus,
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moss-walls, lnlakes, and unsihan 5ys|ems enarlle
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elleenve waler harvzshng, dependable srorage, and lasr
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emugrncy use in normal mllxug lowlands, hlll eounrry,
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and drylands they can also recharge sand basins and
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hwales lrom orherwrse wasled overland lluw, and
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damp our wMfin-s
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POND AND FARM DAM smmczs
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Wherever preelplrallon exceeds rne demands of
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lransplraliou and evaporalinn, small dams, wellaudr,
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and swamps ran prolllerare, All ol lhese rel as long-
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renn warer and wfldlile reserves ln lhe roral landseape,
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and lrlany Auslfllian larms are now ‘dmughk—pmf‘
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due no sens. e mvesurwm m Keylure or similar warer
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eonservallon sysrerns by rhe owners [reellenr leehnlcal
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manuals elm lsee relnersees al rho end ol rhls ehaorerr
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Duns and ponds are polenlial aduaeulrure sues, and
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me pmducuon ol a dlverse plaul and llsh or warerlowl
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prolem prodnu should also be eonsldered during rhelr
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consrruellun, lu humid areas, lherelore, rhese waler
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slorages can orrupy up ln 20% ol lne Iandzscape wnn
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gm! bonelrr rn vaxdlng llsh and a grear vanery ol
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nquaIK product, w al rhe same nme moderaong lhe
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elleers oldrouglu and llood.
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BIOLDGICAL smmcss
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rho gm! loresrs and me biological warer slnxages in
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lhe lonn ol lrulrs and nuls lsueh as lhe eoeonurr are lhe
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buns lor rne prolrlerarion ol llle lonrrs where no ‘hee'
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Wale! orherwne ealsls ln pamcular, browsers, seds
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and lung. draw on rhese hlologlcll rree reserves
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yelr-Ivund, and oerlonn a hosl ol oselul hmrxions in
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any eeusysrem, 0n alolls and arid islands 01 lm»
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dralnmg sands, ule hiologlnl reserves are lhe mam
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warer reserves This is ulren overloohed, ereeol by
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muse lnrlaolranrs dependenr on lhe warns uonlalued ln
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lruna or uurs Many plane. such as anus, palms, and
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agaves have speo‘rle ossuas or organs be alone waler
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ln rhe local mleroellmare, lhe waler ln Vtgelahun
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smally moderares heal and eold excesses, and bolh
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releases #0, and absorbs warer lrom oasslng all roearns
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Easenoal orops such as cassava wxll oroduee eroro as a
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resull o! lne humldrly provlded by surmundlng
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vegeranou, so rhal even lhls side elled ol veseradon ls
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ol productive use lNero Severus: 29 May be)
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nNK muons
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Warer an be raplured oil roor areas, roads, and orher
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paved areas, and used lor borh drinkmg waler and
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shower or [garden waler, pmvldlng ir can be slored.
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wool wurer ls leasr pollured, m mosl easily irealed lor
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dunking and eoolrlng in houses, wrule ahsmpmm beds
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are sullloenr lor lhe muddy or pollured run-on rrorn
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roads and parking alas
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7.3
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EARTHWORKS FOR WATER
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CONSERVATION AND STORAGE
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ror lhe serious small dam and eanh Llnk bullder, lhese
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is no subslllule lor such eompreheusloe rears as lhar
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.eoenlly mmplled by Kannern 0. Nelson was; This
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small classle deals wllh ralrhnsenl ourrnenrs, Nn‘ufl
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ealeulaliuns, sons, eonslruelluu, uullers, vulume and
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rosl esurnares, and mrludes derailed drawings lor usosl
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adlunol srruelures
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However, lller mosl enguleen, Nelson eoueerurares
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mosuy on valley darns lbarrler or Imbankmmu dam),
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and lesson «he plaserrsenl ol dams ln rhe loral deslgned
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155
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