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<br />Table 3.2. Continued. <br /> <br />Reference <br /> <br />Jensen (cont.) <br /> <br />Lewis, L, Delong <br />1977 <br /> <br />'" <br /> <br />Melamed, J. P. <br />1975 <br /> <br />Ribbens, Richard <br />W., 1973 <br /> <br />Constituents <br />IOOdeled <br /> <br />TDS <br /> <br />IDS (Ee) <br /> <br />TDS <br /> <br />- Major assumption(s) <br />in salinity nodel <br /> <br />TDS output of each tributary <br />basin can be edequately IOOdeled <br />using stream flow and TDS deta <br />recorded at the outflow gaging <br />station of each subbasin. <br /> <br />In stream 'IDS frem late S1..1[lJIer <br />to late fall is derived entirely <br />fran groundwater flow. <br /> <br />Ratio of groundwater flow c0m- <br />ponent to the total flow is a <br />function only of the total flow. <br />No hysteresis phen.onena is con- <br />sidered. <br /> <br />Increase in flow tends to de- <br />crease the concentration (TDS) <br /> <br />TDS concentrations and stream <br />loads can be estimated from <br />stream flow records using a <br />regression rrodel derived from <br />chemical analysis. <br /> <br />Constant year-rotmd relation <br />is assuned in the regression <br />procedure. <br /> <br />Precipitation and dissolution <br />processes within soil profile <br />are represented by sOLrrce-sink <br />tem in the IDJdel. <br /> <br />There is a particular concen- <br />tration in the soil solution <br />'Where neither precipitation <br />nor dissolution occurs. <br /> <br />Ion exchange is of minor <br />importance; total salinity <br />(TDS) was considered, <br /> <br />Ion exchange capacity is rela- <br />tively tmeffected by salinity <br />levels generally encowtered <br />in the area. <br /> <br />Flow and salinity are routed <br />through the river system. <br /> <br />Input deta <br />require:nents <br /> <br />Time Cooment <br />~c~~t.___._____._. <br /> <br />l. It-E E <br /> <br />Hodel <br />Application <br /> <br />~--~----- ---.-------- <br /> <br />Stream flow data rronthly <br />and TDS concentra- <br />tions <br /> <br />Experimental set- <br />up of soil colunns, <br />and leaching water <br />of variable quality <br /> <br />Fraction <br />of a day <br /> <br />1 IIDI1th <br /> <br />The nodel is one dimen- <br />sional instream m:xlel. <br />It does not identify <br />salinity contribution <br />from selected sources <br />per se. <br /> <br />Computations using a con- <br />stant parameter sOtD::"ce- <br />sink tenn for the whole <br />soil profile iInproved the <br />prediction of total salts <br />in the entire profile, but <br />still predicted very poorly <br />the salt distribution with <br />depth. <br /> <br />One dimensional <br />instream rodel <br /> <br />Green River <br />Basin, Wyaning <br /> <br />Laboratory <br />analysis and. <br />field testing <br />of soils from <br />Vernal, Utah <br /> <br />Colorado River <br /> <br />