基于熵权-TOPSIS法的柴达木盆地地下水富水性评价

The Evaluation of Groundwater Potential Based on Entropy TOPSIS Models in Qaidam Basin

中文关键词:  柴达木盆地  富水性  TOPSIS  地下水  熵权法

英文关键词:Qaidam Basin  Groundwater Potential  TOPSIS  Groundwater  Entropy method

中文摘要:

      柴达木盆地作为一个典型干旱内陆盆地,其蕴藏的地下水是重要的自然资源。建立影响盆地地下水富水性的特征数据库,采用熵权法和TOPSIS结合的4种模型,对柴达木盆地地下水空间富水性分别进行定量评价。评价结果表明,造成柴达木盆地地下水空间富水性差异的主要原因是植被覆盖度(35.35%)、蒸发损失(26.92%)和入渗补给(18.90%)。盆地西北地区为弱富水性,中部地区为较弱富水性,南部和东部富水性较强。4种模型中E TOPSIS 2模型取得了较为合理的评价结果。最后,将评价得分和140个单井涌水量进行了拟合,建立了基于E TOPSIS 2得分的盆地单井涌水量预测模型。研究结果可对柴达木盆地地下水资源的开发和保护提供一定借鉴意义。

英文摘要:

      Qaidam Basin is known as "Cornucopia" that contains abundant groundwater with natural resources in China. In this study, A characteristic database of groundwater potential factors was established so as to evaluate quantitatively the spatial groundwater potential in Qaidam Basin. The Entropy and Topsis methods had been employed. Results indicate that, the main factors for the spatial groundwater potential difference of groundwater in Qaidam Basin are FVC (35.35%), evaporation (26.92%) and precipitation (18.90%). The E TOPSIS 2 model show that the Northwest of the Qaidam Basin is very low groundwater potential, the Central region is low groundwater potential, and the South and East of the Qaidam Basin are high groundwater potential. Finally, the evaluation score was fitted with the water yield of 140 wells, and the prediction model of water yield of wells in the Qaidam Basin based on E TOPSIS 2 score was established. The research results could be used by decision makers for the development and protection of groundwater resources in Qaidam Basin.