124 lines
3.6 KiB
Plaintext
124 lines
3.6 KiB
Plaintext
|
||
|
||
|
||
|
||
Pr
|
||
E?
|
||
|
||
wuss or {mums
|
||
|
||
Swimming and Ital—(rte pullers m fluwnwuls In umul where
|
||
mes uvlvhmu a Must con: la WI)! ls Ilsa uselul In wllecl wzter
|
||
1mm ruck mam
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
swms
|
||
smles are long, level emvnunns, whlch can vary
|
||
penny m mm and uealnrenl {mm small rrdges In
|
||
gardens reek—prles aernss slupn nr dellbevatelyr
|
||
uraramd lrpllnws ln llallnnds and IOWVsklpe
|
||
budscapzs (Figure 7.73}
|
||
|
||
lee sml (andlllonmg .rr so)! hmwmng ysrems,
|
||
ewsles are .nrended le elem waler m rne undtdvmg
|
||
smk er sedlnrenrs Tnev are, sn-nply, ems -!Inw drv
|
||
channek or hasms ln-ended m mlnlly uunreepl
|
||
overland new. to held u [or a le» hours er days. and lo
|
||
lel u .nlrllrnlc 15 cxouanm’zk RECHARGE mm
|
||
«all; and nee rool s slerns Tvrr» nre lne essennal
|
||
mmponems nl swale plammg syslerns, or we nsk sml
|
||
waler‘ngglng .nd n srrusenuenl hm! xalnfd“ deneu
|
||
enused by laek ol evapelranspmunn er the slered
|
||
Mater nus lree ylanlmg nrusl aeenrnpany swalmg ln
|
||
and «was
|
||
|
||
Swelee shnuld Idtu In“ exceed .n wmm lne lnlnl
|
||
erewn spread n! rne Inngmg uees planned (0 use me
|
||
suned waler absorbed mu) m swale sedunenls Trees
|
||
owl-{shade and cool lne senls cl swalw, lurmrr reduerng
|
||
lne nsle uc mapomuon and drssnlred salr (annulus
|
||
nnn, nr water less. Auhuush swales ean also be grand,
|
||
rew grasscscan elfechvelv mmuve nu» absorbed waler
|
||
w renunndrly alrsrrearns
|
||
|
||
swales are llrerelnre m dely used “1 and m subr
|
||
lrunud, mzn nurnrd nrens, nn brun larrly sleep slope
|
||
and llallands, and .n nnln urban and rural areas They
|
||
am apprnpnare |o mad and ellner sun, er eenlnenrnaled
|
||
mum" lnanesl lwneee rne dusl or lar olls washed en
|
||
|
||
|
||
|
||
have M advusc eneemn lree gmwlnl
|
||
|
||
nre essennels n! swalc mnsn'umon an- sunple they
|
||
are all bum en (amour or dead lcvrl survey lrnes, and
|
||
are neuner .nlended nor permuled lerwnrernnw nrelr
|
||
Pullman ls .usl m lrnld water Unlike dune, swale banks
|
||
and lenses are never enrnpneled ur sealed (although
|
||
srnall lanks ean be sunk .n swale eases (or wannng
|
||
Iweflmk m ueesl Conversely, rne swale smls (all be
|
||
gravelled, rrpped er loosened h: nsslsl wakr
|
||
lnllhmllun m swale depllr and wrdlh (in be uarred u,
|
||
mpe the speed M lnrrllranen leenlly, so um wlder
|
||
and §hal|ower swales are enade m sands, narrower and
|
||
deeper swales rn rlay-lumun sells
|
||
|
||
Alkr an mmAl senes o! rams lha| wk .n a rneue or
|
||
more 0! waler, lrees are seeded or planned on elrner
|
||
bank or slde slepes 9! me swales ThIs enn uake lwo wel
|
||
pernrds Thereal-er, u |akrs Abel.“ >5 yenrs [or lree
|
||
behs k1 uvelshad! llne swnle base, and lo snarl humus
|
||
aeeumulauen lmrn leal lrssue ll-lurnus wrll aaeurnulale.
|
||
hawever, by wash-down and wlnd movement (mm
|
||
hare m upnlll sressl
|
||
|
||
Early .n lne lrle e: an unplanned swale, waler
|
||
nbsoeplm can be slaw. In“ (he eificlrncy ol Ibsavphon
|
||
rnerenses wnh age due (a nee mm and humus evleels.
|
||
As uni happens, ll ls pesslble In adnnl wamr m swales
|
||
1mm ornerareas, leadlng u m w. DIVERSION DRMNS
|
||
mums nus ‘exollc weler 1mm unused mad on lock
|
||
surlnees er overland flow can nub]: me plsnnng d1
|
||
lush-value uees el lugner waler demand a! a new 5:1
|
||
of swnles lo be (unstrunzd
|
||
|
||
Every anbhumld And and |uwn9<ap€ (an, wllh yen
|
||
grungy gal" and men reduced eesl lpr madmg and
|
||
waler usu lu all mad; and paved areas wun swnles,
|
||
flung whldl nee lures snade pavtmem sud .eduee hen
|
||
nnses while "my produce luel, rnulen and lood
|
||
prnduels Every roof rank overflow, and some
|
||
grevwaler wasres can he led m swales m borun
|
||
derergenls are nnl used»
|
||
|
||
Swales mlflpt'nelnllng rne suburban developmenl ol
|
||
vulsge Names m Davis, Calxlomla (erhael Cerbell.
|
||
designerl «(apt all mad and exeess mo! run—on, and
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
mun: 7.2:
|
||
|
||
Sun»; on wmunl an no: flaw, lney lusl sluu and lnen nnlnnrale
|
||
wzmnd Now sweles on nnllsldes in pan nl access 01 prndurlun
|
||
mums
|
||
|
||
|
||
|
||
|
||
|
||
167
|
||
|