河套灌区地下水埋深与总氮浓度交互效应分析  

Analysis of Interactions between Groundwater Depth and Total Nitrogen Concentration in Hetao Irrigation District

作　　者：孙玲玉[1] 杨树青[1] 李凤军[1] 刘德平[1] 常春龙[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《节水灌溉》2014年第7期42-45,共4页Water Saving Irrigation

基　　金："十二五"国家科技支撑计划重点项目(2011BAD29B03);国家自然科学基金(51369019)

摘　　要：为了深入了解河套灌区地下水埋深与TN浓度的空间分布规律及相互作用关系,以内蒙古河套灌区乌拉特前旗北场试验区为研究对象,运用GIS软件中反距离加权差值模块对地下水埋深及TN浓度进行插值,绘制并分析了地下水埋深与TN浓度的空间分布图。结果表明,秋浇前地下水埋深达到最大值,平均埋深为2.38m。秋浇后由于大量水渗到地下,地下水埋深达到年内最小值,平均地下水埋深为0.64m;地下水TN浓度总体分布较分散,五水前与秋浇前地下水总氮浓度均值相近,秋浇后略小。秋浇后期试验区西南部的总氮浓度明显偏低,东北部总氮浓度相对较高;试验区地下水埋深与TN浓度相性关系不明显,但地下水埋深的变化可以定性的表征地下水TN浓度的变化。In order to have a deeper understanding about the spatial distribution patterns and interactions between groundwater depth and total nitrogen（TN） concentration in Hetao Irrigation District, this paper took the north field test area of Urad Front Banner in Hetao Irrigation District as an illustration example, along with the application of Inverse Distance Weighting model in GIS to conduct a interpolation calculation of the groundwater depth and total nitrogen（TN） concentration. Besides, the spatial distribution figures of groundwater depth and total nitrogen（TN） concentration were drew and analyzed. The results indicated that the groundwater level reached to the maximum value of 2. 38 m before the autumn irrigation. While the level turned out to be the annual minimum number of 0. 64m because of the influence of massive infiltration after autumn irrigation. However, the overall distribution of TN concentration in groundwater tended to be decentralized. The mean TN concentration in groundwater prior to the fifth irrigation and autumn irrigation were close to each other, which was smaller after the autumn irrigation. The TN concentration in the southwest part of test area was significantly lower than other places after the autumn irrigation. On the contrary, it tended to be larger in the northeast part. Finally, the relationship between groundwater depth and total nitrogen（TN） concentration in the test area was not obvious, while the total nitrogen（TN） concentration in groundwater could be characterized by the variation of groundwater level qualitatively.

关 键 词：河套灌区 地下水埋深 总氮 反距离加权插值 

分 类 号：TV93[水利工程—水利水电工程]