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首页> 外文期刊>Journal of the American Water Resources Association >MODELED SOURCES, TRANSPORT, AND ACCUMULATION OF DISSOLVEDSOLIDS IN WATER RESOURCES OF THE SOUTHWESTERN UNITED STATES
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MODELED SOURCES, TRANSPORT, AND ACCUMULATION OF DISSOLVEDSOLIDS IN WATER RESOURCES OF THE SOUTHWESTERN UNITED STATES

机译：西南美国水资源中的溶质的模拟来源，运输和累积

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摘要

Information on important source areas for dissolved solids in streams of the southwestern United States, the relative share of deliveries of dissolved solids to streams from natural and human sources, and the potential for salt accumulation in soil or groundwater was developed using a SPAtially Referenced Regressions On Watershed attributes model. Predicted area-normalized reach-catchment delivery rates of dissolved solids to streams ranged from <10 (kg/year)/km~2 for catchments with little or no natural or human-related solute sources in them to 563,000 (kg/year)/km~2 for catchments that were almost entirely cultivated land. For the region as a whole, geologic units contributed 44% of the dissolved-solids deliveries to streams and the remaining 56% of the deliveries came from the release of solutes through irrigation of cultivated and pasture lands, which comprise only 2.5% of the land area. Dissolved-solids accumulation is manifested as precipitated salts in the soil or underlying sediments, and (or) dissolved salts in soil-pore or sediment-pore water, or groundwater, and therefore represents a potential for aquifer contamination. Accumulation rates were <10,000 (kg/year)/km~2 for many hydrologic accounting units (large river basins), but were more than 40,000 (kg/year)/km~2 for the Middle Gila, Lower Gila-Agua Fria, Lower Gila, Lower Bear, Great Salt Lake accounting units, and 247,000 (kg/year)/km~2 for the Salton Sea accounting unit.
机译：使用空间参考回归法开发了有关美国西南部河流中溶解性固体的重要来源地区，自然和人为来源的河流中溶解性固体的相对输送量以及土壤或地下水中盐分累积潜力的信息。分水岭属性模型。预测的区域归一化固溶体向河流的面积归一化水域输送速率范围从<10（kg /年）/ km〜2（对于其中很少或没有天然或人类相关溶质来源的流域）至563,000（kg /年）/几乎完全是耕地的流域的km〜2。对于整个地区，地质单位贡献了44％的溶解固体向河流中输送，其余56％的输送来自通过灌溉耕地和牧场而释放的溶质，而耕地和牧场仅占土地的2.5％区域。溶解固体的积累表现为土壤或下层沉积物中的沉淀盐，和（或）土壤-孔隙或沉积物-孔隙水或地下水中的溶解盐，因此代表了潜在的含水层污染。许多水文核算单位（大型流域）的累积率<10,000（千克/年）/ km〜2，而中吉拉，下吉拉-阿瓜弗里亚， Lower Gila，Lower Bear，大盐湖会计单位，以及Salton Sea会计单位247,000（千克/年）/ km〜2。

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