permds lur dnmeslre use or Urlganun TM laller
slorages, lhnmmm, need le be earemlly deslgned wnln
respecr In much lacuna ns wiely. wakr harvesting, lolal
landseape layrnal, eullel syslems dvawqiuwn, and
placemenl u‘lihve kl lne usage area (prelrmbly
pmvldlng gravlly llanl

A separale mkgnrv ol waler slenges, akm m fields
[or cm}? or blvwse pmdnenan. are mow ponds or we!
lerraees emaled speclllcally [Dr lmk'rrmp Lvegdahon or
mud Polymlmml syslems nl aquatic ammal spesresl

open—warer llree wa|rr snrlaee areal sloragzs are
ml appmpnnle nr lnrnnd elnnnles, where llre pelennal
lar eviporaliwn .s exceeded by average annual mmlall
mere is a vnry real danger llrar sunllar slomges emaled
.n and lo subhumid amas wrll llase adverse elfecls, as
evapnralmn Irum epen waler slarages rnevnamy
earneenlrales drsselved sans firstly, snel. Sally waler
ean alleel ammal health. Seeenaly. lhe lncvnablc
seepage 1mm earrl. dams (in and does ereale areas 0!
salled or enllapsed sdrls downhlll lmm men slamges
And in me ease 0! large barner dams, sa lime waler
may be allowed ls. aypass rnem m flood llme lnar
Igrkuhurll sods, pmdurllve lakes, and esnranes may
lose mare produelwe capacfly by deprwalren a!
flushrwakr and slll dapdsns man can he made up lal
glut" msll by imgallon denved lmm suzh lakes

Dryland smug: snalemes are drsenssed .n chapler
11, mm l have |0 say MN Is span/really addressed la
humldamxs and small dams unless olnerwrse noled

Ban)! dams or wens whm Nulnlng vulls are a m
no leell high er less, and whlch have a large or
overeslzed alable splllway, are no lnreal |u llle er
properw ll well—made They need nal drsplaee
papnlalmns, “up lluw .n slrearns, ereare neam.
problems, l.ll wilh sill, m bkxk llslr mlgmuons ln lasl,
dam: or :Iolagu made :lnvwhuc ml as ban-lens an
slmamsrlix‘ively add leslrearn flaw ln me long lerm

|aw earner dams nl H m «w leell my. ean assnl
slream exygenalmn, proud: permanenl pools, be
ulepped' [0 allow ladders ar bypasses and also
pmvlde \Mal sms ler modesl power genrmhnm walle
almosl all madern assessmenls wuuld eondernn or ban
largeseale dams land Iarglysnle power sellemesl on
are mean: el pas: and «)nllnumg llasco), a saber
assessmenl al small warer arorages shows muluplz
beeems

elven |he range or excellenl leals an small dams
lanen availabk lnrrn leeal waler aullmnnes, and by
mall order 1mm good lawksleresl, l have llaerelare
avolded speellre and well—publisned ednslrueuon
drunk, and have new elaborated more all me rypes,
plaeemenl, links la and lmm, and luncnon of small
dams in rlle lanal landseape. Yeomans «pus mm,
ma) has slaled lhal h: bellzvei llral .l lmm “145% 0!
a normal, lnnmd, lowland er loam I landseape were
ruled wllh small elr|h slurages, floods and dmngrn or
me lllrear eonld be allmmaaed

Nal all landseapes ean cwst1lfenlvely slme uns

 

 

 

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157