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13 <br />Figure 6 <br />irrigated acreage is slowly increasing, the demand on ground water may be constant or <br />diminishing. This would tend to counteract the overdraft conditions that lowered the <br />water table during the 1960 and 1970 decades. <br />URBANIZATION <br />Urbanization has conflicting influences on the water table. <br />7mayhave n Paving streets and parking lots increases the percentage of <br />ome rainfall that runs off to stre ams rather than seeping into the <br />on ground. Although, urban lawns, parks, golf courses, etc. tend to <br />r. increase recharge to the aquifer in the Grand Island area, <br />urbanization of irrigated land is a factor that is difficult to <br />assess. The water table in and around Grand Island seems to be <br />rebounding from earlier depletion from pumping ground water for irrigation. The cause <br />may be a combination of urbanization and several years of above normal precipitation. <br />Ground Water and River Flow Analyses <br />Irrigation in Central Platte <br />Natural Resources District <br />2000 <br />20 <br />a> <br />1500 <br />15 <br />L <br />� <br />CO <br />F, <br />a <br />Q <br />U) 1000 <br />10 <br />Nom_„ <br />U <br />Y <br />(0 <br />.. <br />Q <br />E <br />rn <br />500 <br />5 <br />W <br />Wells — Acreag <br />0 <br />1 1 1 <br />1 0 <br />1950 <br />1960 1970 1980 1990 <br />2000 <br />1955 1965 1975 1985 1995 <br />Year <br />Figure 6 <br />irrigated acreage is slowly increasing, the demand on ground water may be constant or <br />diminishing. This would tend to counteract the overdraft conditions that lowered the <br />water table during the 1960 and 1970 decades. <br />URBANIZATION <br />Urbanization has conflicting influences on the water table. <br />7mayhave n Paving streets and parking lots increases the percentage of <br />ome rainfall that runs off to stre ams rather than seeping into the <br />on ground. Although, urban lawns, parks, golf courses, etc. tend to <br />r. increase recharge to the aquifer in the Grand Island area, <br />urbanization of irrigated land is a factor that is difficult to <br />assess. The water table in and around Grand Island seems to be <br />rebounding from earlier depletion from pumping ground water for irrigation. The cause <br />may be a combination of urbanization and several years of above normal precipitation. <br />Ground Water and River Flow Analyses <br />