| 李品芳,李保国.毛乌素沙地水分蒸发和草地蒸散特征的比较研究[J].水利学报,2000,31(3):0024-0029 |
| 毛乌素沙地水分蒸发和草地蒸散特征的比较研究 |
| Study on some characteristics of evaporation of sand dune and evapotranspiration of grassland in Mu Us desert |
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| DOI： |
| 中文关键词: 毛乌素沙地 干沙层 蒸发 蒸散 |
| 英文关键词: Mu Us desert dry surface layer evaporation evapotranspiration |
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| 中文摘要: |
| 本文针对毛乌素沙地水资源的高效利用问题，主要探讨了干沙层的形成及其对土壤水分蒸发特性的影响以及草地的蒸散量。结果表明沙丘沙的水分蒸发量主要取决于干沙层的厚度和地温的高低，并可用干燥表层法模型简单求算，结果是蒸发速率的平均值约为0.04mm/h，日平均蒸发量为1mm(夏季).同时在毛乌素沙地进行了草地蒸散量的实地测定，其结果是远远大于沙土的蒸发量。如生长良好的沙打旺日蒸散量平均约为5mm.本项研究对沙质荒漠化地区水资源高效利用有一定参考意义。 |
| 英文摘要: |
| The formation of dry surface layer and its effect on characteristics of evaporation of sand dune and the evapotranspiration of grassland in the Mu Us desert are discussed in this paper. The result shows that the amount of evaporation from sand dune is dependent on the thickness of dry surface layer and soil temperature and could be calculated with a model of dry surface layer. The measurement indicates that evapotranspiration of grassland is significantly greater than that of sand dune and the average evapotranspiration of grassland is 5mm/d (summer) in the Mu Us dessert. |
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