|
<br />:~-.r~kJ>,j.;;;::f~t;?Y';:~{:::~;j:~: ::,i.:,:.:.'~ ,:" " '
<br />
<br />":" :.~~: ,~;.;_ .~.f: ';.~::r:~: :'>~~~::.'::~~ ~~ i;~~~}~(:::.
<br />
<br />. .::.: '..~ .:-~ ..... <-: ;",;". ....:. ,. -' ,
<br />
<br />, "\'- "'"".:' .-.:....... ..'.. ...."...,..-,.__..
<br />..,.,:;' ;'::'~./ :_\~: ::- j".~~~-~: ~::..~~~:::~ :.. <<.~.~:. ". : J"~- ;..~~-:::.:_' ".; i~~.:;..;"::'~" ":" ~:<..:~
<br />- :'. ~ .....: ,:;.;--..:.: .~ .. .... .' ':".:- :"
<br />
<br />o
<br />CJl
<br />Ul
<br />o
<br />
<br />....
<br />
<br />.:.
<br />"
<br />;,:"-'!;.,
<br />
<br />:..:. .:~:.
<br />
<br />The transmissibility map is based on pumping tests
<br />
<br />
<br />and well 1098, which define the saturated thickness and
<br />
<br />
<br />permeability of the sand and gravel aquifer. Tran8missibili~
<br />
<br />ranges from 50,000 to more than 200,000 gallons per day per
<br />
<br />
<br />foot. The variation is caused by differences in saturated
<br />
<br />
<br />thickness or in permeability (i.e" type of material and
<br />
<br />
<br />sorting). This map can also be used to determine well spacing
<br />
<br />
<br />and to estimate the potential yield of irrigation wells.
<br />
<br />Areas are outlined where larqe.capacity wells could be
<br />
<br />
<br />developed to exchange grouncS water for surface water. For
<br />
<br />
<br />example, in areas where a transmissibility of 200,000
<br />
<br />
<br />prevails, a well could be pumped at a sustained rate of
<br />
<br />
<br />1,200 gpm and, conversely, in transmissibility areas of
<br />
<br />
<br />50,000 to 100,000 the well yield would only be 450 gpm,
<br />
<br />
<br />The hydrology of the system will be 8uperimposecS on the
<br />
<br />
<br />framework of the model as previously cSescribed. We will
<br />
<br />
<br />program the information obtain.cS from the water level
<br />
<br />
<br />in a thousand wells measured in october 1963, May 1964,
<br />
<br />
<br />August 1964, and october 1964. For each of these periods,
<br />
<br />
<br />"",'ater-level-change maps have been constructedl An example
<br />
<br />of the water-level changes between OCt. 1, 1963 and May 1,
<br />and May 1 and Aug. 1, 1964, is shown on thh :u:!op (fig. 4). (/0. P
<br />
<br />--,/JI v'
<br />Figure 4. ) Maps showing water-level change, Oct. 1, 1963,
<br />
<br />to May 1. 1964, and May 1, 1964 to Aug. 1, 1964.~
<br />
<br />~
<br />
<br />~~:.J~~)~
<br />",:~-:,,;::<,
<br />
<br />........_,.
<br />'... ".~-
<br />
<br />.'...0.:.
<br />
<br />-~=.: -.'
<br />
<br />....:..
<br />
<br />....-..
<br />
<br />," .~ .
<br />.;". "..
<br />
<br />:~.....:, .
<br />.": ,. ':~'
<br />';~.' i ~ ~.
<br />';/};1
<br />
<br />.,' ~ ..
<br />'~.': .....-
<br />::c. "
<br />7:"':':.:';"
<br />~~~~~'<y~~
<br />;~if;
<br />~j;~{~
<br />
<br />~ :~'::?~
<br />
<br />>~:~ A-~
<br />
<br />'. ':-; ".~.
<br />i/~~}lr;
<br />:---:. .~...."
<br />
<br />~~t~;~g;
<br />;;!:;!I
<br />::~th~~
<br />':{t!"'l
<br />
<br />" ......
<br />~:;.; .~.:.:(.
<br />
<br />. ';.~:,;:,.,:
<br />
<br />.~~;~:~~r~
<br />~;
<br />
<br />, '., ~ ~". ".
<br />:.,~: .:.;
<br />
<br />........
<br />
<br />:<./" ~:::
<br />
<br />';""-:'1
<br />
<br />-;...'
<br />
<br />
|