论文部分内容阅读
以达拉特旗壕庆河流域为研究对象,通过对该区地下水位和水质的监测及农田水利用状况的调查,摸清地下水的年动态变化规律及水质分布,初步估算该研究区农田灌溉地下水年开采量,从而为本流域的地下水资源评价及合理开发,高效利用提供一定的依据。根据数据分析结果,地下水是从西南流向东北方向,补给黄河南岸引黄灌区。观测期间地下水位年际变化受降雨的影响较大,总体呈上升趋势,变化幅度为0.5～1.5m。pH值超过8.5,呈碱性水,部分区域地下水矿化度为0.5～0.9g/L,可用于农业灌溉,随着地下水流动的方向,水质逐渐变差,下游的盐分浓度最大到2.6g/L,需要合理进行灌溉防止土壤盐碱化。通过遥感图片识别分析计算出该区农田面积为1 398hm2,农业灌溉年开采地下水量为516万m3。
Based on the investigation of the Mohe River Basin in Dalate Banner, this paper studied the dynamic changes of groundwater and the distribution of water quality through the monitoring of groundwater table and water quality and the investigation of farmland water utilization in this area, Groundwater exploitation, so as to provide a basis for the assessment of groundwater resources and rational development and efficient utilization of the basin. According to the results of data analysis, groundwater flows from the southwest to the northeast and supplies the Yellow River Irrigation District on the south bank of the Yellow River. The interannual variation of groundwater table during the observation period was greatly affected by rainfall, with a general upward trend, with a variation range of 0.5-1.5 m. The pH value is over 8.5, showing alkaline water. The salinity of groundwater in some areas is 0.5 ~ 0.9g / L, which can be used for agricultural irrigation. With the flow of groundwater, the water quality gradually deteriorates, and the salt concentration in the downstream reaches 2.6g / L, need reasonable irrigation to prevent soil salinization. The area of farmland in this area was calculated to be 1 398hm2 by remote sensing image recognition and analysis, and the amount of groundwater exploited in agricultural irrigation was 5.16 million m3.