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首页> 外文会议>Symposium on Water Resources Systems - Water Availability and Global Change; Jun 30-Jul 11, 2003; Sapporo, Japan >Effect of irrigation on groundwater chemistry in the lower Chambal Command area, Madhya Pradesh, India
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Effect of irrigation on groundwater chemistry in the lower Chambal Command area, Madhya Pradesh, India

机译：灌溉对印度中央邦下尚巴尔指挥部地区地下水化学的影响

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摘要

The study area is a part of the Chambal and Sind River basin, in the Bhind and Morena districts of Madhya Pradesh, India. It is irrigated by the Chambal canal system. The area comprises alluvium in which groundwater occurs under unconfined and semi-confined conditions. To determine the effect of irrigation on groundwater chemistry, 45 groundwater samples from a non-irrigated area, and 45 samples from an irrigated area, were collected during May-June 1998 from the existing dug wells. The major cations and anions were determined from the samples. The statistical analysis of these data suggests that irrigation does have an effect on groundwater chemistry. At the 99% confidence level, the concentrations of the chemical constituents are much higher in the irrigated area than the non-irrigated area. These areas are identical except in their agricultural development. Although most of the groundwater samples are of good quality for irrigation purposes, some of them are unsuitable for irrigation. The processes associated with surface water irrigation and involved in modifying the concentration of chemical constituents in groundwater are evaporation and transpiration, mineral dissolution, dissolution of fertilizers, mixing with existing groundwater, CO_2 uptake and ion exchange. In addition, calcite precipitation is likely to be a control on Ca and HCO_3 concentrations at several stages. Although the method has only examined one "snap shot" in time, the approach to data analysis adopted here is simple enough to be incorporated as routine following field collection of data but it is representative of a longer-term average.
机译：研究区域是印度中央邦的Bhind和Morena地区的Chambal和Sind河盆地的一部分。它是由香巴拉运河系统灌溉的。该区域包括冲积层，地下水在无限制和半限制条件下发生。为了确定灌溉对地下水化学的影响，在1998年5月至6月期间，从现有的挖井中采集了45个非灌溉区的地下水样品和45个灌溉区的样品。从样品中确定了主要的阳离子和阴离子。这些数据的统计分析表明，灌溉确实对地下水化学有影响。在置信度为99％的情况下，灌溉区域中化学成分的浓度比非灌溉区域高得多。除了农业发展以外，这些地区是相同的。尽管大多数地下水样品的灌溉质量良好，但其中一些不适合灌溉。与地表水灌溉相关的过程涉及改变地下水中化学成分的浓度，包括蒸发和蒸腾作用，矿物质溶解，肥料溶解，与现有地下水混合，CO_2吸收和离子交换。此外，方解石的沉淀可能在多个阶段控制了Ca和HCO_3的浓度。尽管该方法仅及时检查了一次“快照”，但此处采用的数据分析方法非常简单，可以作为现场数据收集后的常规方法使用，但它代表了长期平均值。

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