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Eastern San Joaquin Groundwater Basin Groundwater Management Plan
<br /> Table 2-5 Estimated and Projected Agricultural Water Demands
<br /> Applied Water Requirement under Average Conditions
<br /> District 1996 Estimated Applied Water 2030 Projected Applied Water
<br /> (Within San Joaquin County Only) Demand (af/yr) Demand (af/yr)
<br /> North Delta Water Agency 37,244 37,244
<br /> Central Delta Water Agency 209,622 209,622
<br /> South Delta Water Agency 206,759 206,759
<br /> West Side ID 17,205 17,205
<br /> City of Tracy 34,192 -
<br /> Banta-Carbona 42,585 42,585
<br /> Lathrop 21,225 -
<br /> South Delta Area Total 321,966 266,549
<br /> Del Puerto WD 15,529 15,529
<br /> Plain View WD 11,217 11,217
<br /> North San Joaquin WCD 88,022 88,022
<br /> Woodbridge ID 102,517 102,517
<br /> Lodi 5,124 -
<br /> Stockton East WD 151,210 151,210
<br /> Stockton 38,701 -
<br /> SEWD Total 189,911 151,210
<br /> Central San Joaquin WCD 159,554 159,554
<br /> Oakdale ID 48,391 48,391
<br /> South San Joaquin ID 126,709 126,709
<br /> Manteca 21,663 -
<br /> Escalon 1,761
<br /> Ripon 9,508 -
<br /> SSJID Total 159,641 126,709
<br /> Unincorporated Areas 173,390 173,390
<br /> Total 1,522,128 1,389,954
<br /> Notes:
<br /> 1. This table was modified based on comments received on the Draft SJCWMP. It was compiled from the DWR land use
<br /> information linked to Private,State and Federal water district outlines in a GIs system. There are significant areas of
<br /> overlap between city limits,spheres of influence,and between water districts themselves. Bearing this in mind,there are
<br /> bound to be variations and differences between these estimates and those compiled using different methodology.The
<br /> figures in this table represent theoretical applied water requirements for average conditions.
<br /> 2. The quantity of water actually pumped,diverted and applied will be significantly different due to a variety of factors
<br /> including distribution system inefficiencies and losses(ranging from 10 to 20%),climate,soil conditions,etc. The loss of
<br /> agricultural land to urban expansion is illustrated by the reduction in agricultural acreage currently located within urban
<br /> spheres of influence.
<br /> 3. Agricultural lands in urban areas and urban spheres of influence are phased out completely by 2030. Other changes are
<br /> likely to impact water demand,such changes in cropping patterns,irrigation methods,and farming of previously vacant
<br /> land. However,these changes have not been quantified in any systematic or reliable basis.
<br /> 4. Urban development will be undertaken by increasing urban densities through infill of spheres of influence. Development
<br /> according to this guideline has yet to gain market acceptance and widespread application in the County. However,
<br /> current development patterns,and their associated average unit water usage rates,are assumed to apply in the future.
<br /> 5. Local urban development practices will result in new developments with similar water use rate. Water use figures were
<br /> calculated for each individual urban area,and these figures were applied to future development. Each urban area has a
<br /> unique unit water use rate based upon local factors,such as amounts of open space and conservation practices. As best
<br /> management practices are implemented with respect to water conservation,projected water demands for urban
<br /> developments may actually be conservative as compared to past conservation efforts.
<br /> 6. The urban spheres of influence reflect 2030 development. The urban spheres reflect the local plans for where expansion
<br /> could occur in the future,but it is possible that the development will occur in different areas,or in different amounts than
<br /> predicted. The State Department of Finance predicts future populations;the projected 2030 population can fit within the
<br /> spheres at current urban densities.
<br /> The assumptions in Table 2-5 simplify the process of predicting future water demands. The
<br /> analysis undertaken does in no way imply that other changes in urban development and
<br /> agriculture are not likely, nor are the assumptions intended to discourage implementation of
<br /> structural or policy changes that improve water use efficiency. For the purposes of the Plan,
<br /> extensive analysis of the sensitivity of the assumptions on the projected water demand was not
<br /> Northeastern San Joaquin County Section 2
<br /> Groundwater Banking Authority 76 Hydrogeology
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