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<br />Population, Resources and Industries: <br /> <br />c:> <br /> <br />" <br /> <br />Springfield is the metropolitan hub of southwest Missouri. <br />Except in Greene County, most of the population of southwest <br />Missouri is rural in nature. A large number of people are drawn <br />to the study area because of the expanding industries and educa- <br />tional institutions. Table 1 presents population trends and pro- <br />jections for Greene and Christian Counties. Income trends are <br />in Table 2. <br /> <br />N <br />W <br />-J <br />~ <br /> <br />Springfield is the home of four colleges and a state univer- <br />sity. The college enrollment for 1974 was 5,800 students. South- <br />west Missouri State University had 10,500 students enrolled in <br />1974.5 <br /> <br />Industry in the area has been increasing since 1950. Manu- <br />facturing growth in the area is spreading from Springfield into <br />more rural areas. Table 3 (a & b)contains employment statistics <br />for the area.6 <br /> <br />Since 1957, stone has been the most important mineral com- <br />modity produced in both tonnage and value of production. Prin- <br />cipal rock uni ts quarried are the Mississippian Warsaw and Burling- <br />ton-Keokuk limestones. These limestones are suitable for cement <br />manfacture.7 Mineral resource data is contained in Table 4. <br /> <br />Land Resources Development and Utilization: <br /> <br />Land use by activity and acreage are shown in Table 5. Sizes <br />of farms have been steadily increasing, while numbers of farms are <br />on the decline. Value of farm products and crops harvested is <br />shown in Tables 6 and 7. <br /> <br />Livestock, particularly cattle, in 1969 was the major income <br />product of the area. From 1959 to 1969 the number of cattle in- <br />creased by about 20 percent. Sizeable income is also gerived from <br />the processing and marketing of agricultural products. <br /> <br />Major streams in the area are sustained during low flow periods <br />by inflow from natural underground reservoirs in the soluble car- <br />bonate rocks. Surface streams and groundwater sources in the <br />study area are interconnected and can be regarded as parts of a <br />single system, differing mainly in flow rstes. Periodically the <br />flow patterns of a number of smaller tr~butary streams are inter- <br />rupted by water losses to bedrock. These streams may disappear <br />entirely where the rock underlying the stream is very permeable. <br /> <br />The groundwater supply in the area comes from two contrast- <br />ing environments. Near the surface, groundwater is contained in <br />a "shallow" aquifer of Mississippian age. A second groundwater <br />source is a "deep" aquifer of Cambrian-Ordovician age. <br /> <br />The "shallow" aquifer consists of cherty limestones at or <br />near the surface. This aquifer has been much used in the past <br /> <br />87 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />. <br /> <br />. <br /> <br />'. <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br />