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<br />17 <br /> <br />T-test was conducted to determine the significance of the difference <br /> <br />~ of the means for soil depths between two sets of basins according to <br />W <br />en bedrock type. Since hillslope-facing directions were quite variable <br />00 <br />within each basin, the soil depth-hillslope aspect relationship was not <br /> <br />tested. <br /> <br />Previous investigations have shown that erosion and salinity of <br /> <br />runoff increase with increasing hillslope gradient. Since hillslope <br /> <br />gradients increase as relief increases, a relative relief map was com- <br /> <br />piled according to the method described by Kertesz (1979). The study <br /> <br />area was divided into grids for which the relative relief in meters per <br /> <br />square kilometer was determined. The purpose of the map was to <br /> <br />delineate areas of high or low relative relief which would indicate <br /> <br />areas of relatively high or low sediment and salt production, respec- <br /> <br />tively. Topographic maps (1:24,000) were used to measure relative <br /> <br />relief. <br /> <br />Field investigations showed that three major landforms are pre- <br /> <br />sent in the area: 1) badlands; 2) pediments; and 3) alluvial valley <br /> <br />floors in major drainages. The three landforms were delineated on a <br /> <br />landforms map in order that t4e erosionally unstable badlands would <br /> <br />be differentiated from the more stable pediments and alluvial valley <br /> <br />floors. Aerial photographs (1:20,000) and topographic maps (1:24,000) <br /> <br />were used to map the landforms. <br /> <br />4. 2 Salinity <br /> <br />The surficial materials of several small basins in the badlands <br /> <br />were examined for inter- and intrabasin SMC relationships that could <br /> <br />be inferred for all of the badlands in the area. For the same reason <br />