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<br /> <br />Figure 2-8 <br /> <br />AVERAGE ANNUAL <br />GROSS LAKE EVAPORATION <br /> <br />AVERAGE ANNUAL <br />NET LAKE EVAPORATION <br /> <br />r-.-----------.-:--.---..-..-----..,.....~,.- . ""1 <br /> <br />I ' <br /> <br /> <br />"- <br /> <br /> <br />I <br /> <br />L._,_.._,_.._._____.,_,._.,_.._,_._,._,____.._J. <br /> <br />-~ , <br />,--'-- 48 ."-, <br />~50" . <br />, <br />I . 52-"" ~.. <br />L..._"_.._._"_.._._.,_.._,_______,_____,., <br />EVAporation In Inches ~ <br /> <br />SOILS AND VEGETATION <br /> <br />Soils <br /> <br />In general, the Platte River Basin has four soil regions as <br />shown in figure 2-9. Silty soils are dominant in the south central <br />and eastern parts of the basin. These soils contain considerable <br /> <br />amounts of minerals and humus and have good water-holding capacity. <br /> <br />There are sandy spots scattered throughout this region where a <br /> <br />glacier left sand and gravel or a river washed along enough sand <br /> <br />to fill its bed. There are also a small number of places where <br />wind and water erosion have exposed areas of bedrock, but generally <br /> <br />the silty soil region has sufficient topsoil to produce good crops. <br /> <br />2-12 <br />