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GROUND WATER IN THE CENTRAL VALLEY,CALIFORNIA A29 <br /> 123' 122° 121° 120° 119' 118° <br /> Red Bluff .1 <br /> ■ <br /> 40 EXPLANATION <br /> AREA OF SUBSIDENCE DUE TO <br /> HYDROCOMPACTION <br /> AREA WHERE SUBSIDENCE DUE TO WATER- <br /> Sutter LEVEL DECLINE IS MORE THAN 1 FOOT <br /> Dulles <br /> ElAREA OF SUWIDENCE DUE TO COMPAf:"TION OF <br /> PEAT AND BASED ON FIELD SURVEYS IN 1952 <br /> AREA WHERE SUBSIDENCE DLT TO <br /> 391COMPACTION OF PEAT IS MORE THAN <br /> 10 FEET AS OF 1981 <br /> Sacramento <br /> Davis-Zamora Area <br /> 38 <br /> Alluvial <br /> boundary <br /> 37` <br /> resno� <br /> Is- <br /> Los Banos-Kettleman City Area <br /> 36 131111 pill <br /> 0 5o 100 MILES <br /> r r <br /> 0 5o 100 KILOMETERS <br /> Q Bake Arrin-Marieopa Area <br /> Tulare-Wasca Area <br /> Q� <br /> 35 — <br /> FioURE 19.—Areal extent of land subsidence in the Central Valley(modified From Williamson and others, 1989). <br />