许迪,丁昆仑,蔡林根.区域水土特性参数时空变异分布特征及相关分析[J].中国水利水电科学研究院学报,2003,(1):
区域水土特性参数时空变异分布特征及相关分析
Analysis on temporal and spatial variability of soil and water parameters in a large irrigation area
  
DOI:
中文关键词:  水土特性  时间与空间变异性  农田排水含盐量  地下水含盐量  表层土壤含盐量
英文关键词:soil and water parameters  temporal and spatial variability  amount of salt in surface drain??age water and irrigation return flow  amount of salt in groundwater  surface soil salinity
基金项目:
作者单位
许迪 国家节水灌溉北京工程技术研究中心北京100044 
丁昆仑 国家节水灌溉北京工程技术研究中心北京100044 
蔡林根 国家节水灌溉北京工程技术研究中心北京100044 
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中文摘要:
      作者应用地质统计学原理与方法, 在山东簸箕李引黄灌区开展大尺度区域水土特性参数时空变异性的研究, 描述农田排水、地下水、表层土壤中含盐量的空间与时间变化分布趋势和特征, 分析其间存在的相关关系。结果表明, 在一个完整的水文循环年内, 研究区域的水土特性参数之间具有相近的空间变异分布状态和特点,但却表现出不同的时间变异分布趋势与特征。农田排水和表层土壤的含盐量随季节变化的分布状态在灌区上、下游相对稳定, 在中游却变化明显; 地下水的盐分浓度在整个灌区的分布状况没有呈现出明显的时间变异性。在春季至初夏时段内, 农田排水中含盐量的增加似乎对地下水水质的影响较小, 而对表层土壤积盐状况影响较大。研究成果为灌区制定合理的水资源利用与农田水土管理策略提供了理论依据。
英文摘要:
      By applying the geo??statistical techniques to a large area in the Bojili Irrigat ion District, the authors conducted a study on the temporal and spatial variability of the regional soil and water parameters, i. e. , the amount of salt in surface drainage water and irrigation return flow, the amount of salt in groundwater and the surface soil salinity. The tendency and features of the temporal and spatial distributions and changes were depicted and the correlations among these parameters were analyzed. The results showed that , within a full hydrological cycle year, the spat ial variation of these parameters possessed similar distribution features, while the temporal variat ion appeared with different distribution ten??dency and features. The distributions of the amount of salt in surface drainage water and irrigation return flow as well as the surface soil salinity in different seasons were relat ively stable in the upper and lower areas, but varied significantly in the middle area of this irrigation project . The distributions of the amount of salt in groundwater at different seasons showed a low temporal variability. In the period of spring to early summer, the increased salinity of surface drainage water and irrigation return flow likely had little impact on the groundwater quality, but did have great impact on the increased surface soil salinity. The results would be helpful to formulate a soil and water management strategies for rational utilization of all kinds of water resources in this region.
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