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<br />.e <br /> <br />.' <br /> <br />Part 4 - Reservoir Data (Contd) <br /> <br />During the construction of the dam and the following period of <br /> <br /> <br />operation of John Martin Reservoir. the U. S. District Engineer Office <br /> <br />conducted tests and oompiled information concerning the amounts of silt <br /> <br />in suspension in the waters of the Arkansas River at and above Caddoa. <br /> <br />These data were analyzed and arranged to indicate relations between <br /> <br />suspended silt and monthly streamflow volumes, and were supplemented to <br /> <br />include sediments transported as bed-loads by major floods. From these <br /> <br />data Table 16 was prepared, to indicate the quantities of sediment tha~ <br /> <br />probably would have deposited in the reservoir, assuming the dam was <br /> <br />completed and the reservoir was operated beginning October 1, 1907 and <br /> <br />. <br /> <br />ending September 30. 1942. <br /> <br />,. <br /> <br />Fro~ these monthly sedimentation data Table 17 was prepared. <br /> <br />showing the quantities of sediment estimated to have accumulated in the <br /> <br /> <br />oonservation (or irrigation) pool below Elevaticn 3851, from whioh (and <br /> <br />the initial capacity Table 15) Table 18 was prepared, showing the effective <br /> <br />storage capacities of the conservation pool during each month of the 1908. <br /> <br /> <br />1942 study periodJ and Table 19 was prepared fihowiag the surface areas and <br /> <br />effeotive storage capacities at the end of the study period, These estimated <br /> <br />sedimentation quantities and calculated storage capacities may be summarized <br /> <br />as follows: <br /> <br />JOHN MART1N RESERVOIR <br />Conservation Flood Combined <br />Pool Pool Totals <br /> <br />... <br /> <br />H. W. L. Elevation (feet) <br />Initial Storage Capacities (AF) <br />Capacities, End of 35 Years (AF) <br />Est. Sedimentation (AF) <br />Indicated Rate (AF per year) <br /> <br />3,851 <br />420,068 <br />204,850 <br />215,218 <br />6,149 <br /> <br />3,870 <br />281,150. <br />235,392 <br />45,758 <br />1.307 <br /> <br />3,870 <br />701,218 <br />440,242 <br />260,976 <br />7.456 <br /> <br />..26.. <br />