|
<br />',.
<br />
<br />-.~ _.1 "~ l '!
<br />
<br />~'."
<br />~
<br />l'.P
<br />
<br />,. ;,~
<br />....,.
<br />
<br />~
<br />
<br />,.
<br />
<br />.
<br />
<br />rClr.O\'O ver,etativc covcr.~
<br />
<br />Construction :tcti....ity would bo a disturbance
<br />. .,
<br />
<br />.
<br />
<br />,.
<br />'.::.~~~:-.;
<br />
<br />to \~ildJ.ife in tho are:t of construction.
<br />
<br />Irrir,:ttien has had :t siinificant effect on pl:mt and animal life in tl:c
<br />
<br />Granu Valley. Irrigated cropland is utilized for fecdin!: anti occasion-
<br />all)' nesting while m:tny miles of excellent coVer have been created
<br />along canals, .ditchos, l.aterals, and slour.h <1reas. Many of these areas
<br />
<br />arc due to seepa!:e, hi31> \later tables, arid excoss waterflo.'s.
<br />
<br />It is estimated that there are :tbout 18,000 acres of phreatoJlhytic
<br />
<br />vegct:ttion in the Grand Valley arca.l The phrcatophytos arc grease-
<br />
<br />\~ood, salt cedar, Hillo\~s, and cottonwoods which arc. high wate= users.
<br />
<br />ll)'drophytes, including cattails and bullrushos, are Hidespread in the
<br />
<br />area where conditions are favorable. It is estimated that there arc
<br />
<br />1,000 ~cres of seeped l:tnd in tho Grand Valloy area. 1
<br />
<br />The !i~i~g of i~rig~:io" ;ystows
<br />
<br />..-.... ,
<br />wvu.J.U
<br />
<br />~.. I _
<br />.i.L.:\,.l.LLI,,';U
<br />
<br />the.: ffioisture available
<br />
<br />:..>-
<br />
<br />;
<br />
<br />." "
<br />.:.".
<br />....'r..
<br />..... ",
<br />
<br />..,~~ ,-. ," .:
<br />
<br />
<br />-. .;"
<br />." .....
<br />
<br />"., ",
<br />I.. - .".
<br />
<br />:}':'.::~
<br />
<br />:,....::.-:
<br />
<br />\~;~i:':
<br />}~~tr~:~
<br />'~~~
<br />(~~:\:~~~
<br />Ij~~~\;.1
<br />t:;'i:::,.
<br />;~~:~i~
<br />'. .:~.: ,"
<br />,....;:.,.....:
<br />..;;....._..
<br />;...-:-'./::,
<br />~:~~/~~~~.~
<br />:~.~<':..:t"
<br />. ......
<br />.". -'-'-".
<br />
<br />.s<:~<~
<br />
<br />........
<br />.-.:,,"-,
<br />.~ .'
<br />
<br />>t.:.:::
<br />
<br />.........
<br />
<br />.". 'I.'.; :~.
<br />
<br />;:;~. ;;.: . ~
<br />;.~~~.::/:.::.
<br />
<br />....,....
<br />
<br />..,....
<br />..
<br />
<br />~.. . .
<br />
<br />.,
<br />
<br />..-. .'
<br />
<br />,,,;- J;k',i1f%:Sct~'~~]ifi~~;,p~~i~I'i~i;;;~K~'''~:~ .c' .<i,;"J;(:c
<br />
<br />fOl' .vegetation along these systems and \':ould 10lier l'later tables that
<br />
<br />support phreatophytic growth. As a consequence the veeetation would
<br />
<br />bo reduced and liouId crc::,ie a decline in the amount of important liild-
<br />
<br />life habitat. Good habitat is essential in agricultural areas if wild
<br />
<br />animals are! to survive. Studies are needed to determine! the extent of
<br />
<br />1 ) .
<br />Anon;r.::n\:s. 196$. l'la~cr :md Related L:md :~esourccs: Colorado
<br />River B;-:.::;i-:1 in COlor-oldv, Coloracio :'Ji1~cr Con~cr.""tion Ooard al;u
<br />~~itcci States D~~~r~cc~t of A3riculturc.
<br />
<br />..p,.:'
<br />
<br />
|