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摘要:
本数据集包含了2015年在关中盆地采集的200个地下水样品的位置信息、取样层位信息及33项无机地球化学成分测试结果信息。水质综合评价的结果按照地下水质量级别划分，除去10个空白水样，样品中Ⅱ类水2件，Ⅲ类水57件，Ⅳ类水56件，Ⅴ类水75件；按照地下水水质类型划分，淡水111件，半咸水71件，咸水8件。采样过程规范，测试结果均由具备国家认可资质的实验室测试完成，数据质量可靠。关中盆地从盆地边缘至盆地中心，地下水化学类型由HCO3-Ca型经HCO3-Ca·Mg·Na型转变为SO4·Cl-Na型，呈明显的水平分带性规律。水质评价的结果表明，该时段关中盆地地下水质量状况较差，有68.9%的地下水不适于直接饮用。其中Ⅱ-Ⅲ类水主要分布在关中盆地的南部、西部和北部的局部地区；Ⅳ类水主要分布在渭河边、高陵县、泾阳县和乾县；Ⅴ类水主要分布在大荔县、蒲城县、富平县、阎良区、咸阳市区周边、三原县和礼泉县。本数据集可为研究关中盆地地下水循环演化等提供地球化学指标参考。
Abstract:This dataset contains information about the locations and sampling layers of 200 groundwater samples taken in the Guanzhong Basin in 2015 as well as test results of 33 inorganic geochemical components. According to a comprehensive water quality evaluation, the samples above, if classified by water quality level, include 10 blank samples, 2 class-Ⅱ samples, 57 class-Ⅲ samples, 56 class-Ⅳ samples, and 75 class-Ⅴ samples. If classified by water quality type, they include 111 fresh water samples, 71 brackish water samples, and 8 saline water samples. Samples were taken in compliance with procedures. Test results were obtained in qualified laboratory tests, so the obtained data was of a reliable quality. From the margin to the center of the Guanzhong Basin, the hydrochemical types of groundwater change from HCO3-Ca to HCO3-Ca·Mg·Na and then to SO4·Cl-Na, presenting a distinct horizontal zoning character pattern. According to the water quality evaluation, the groundwater quality is poor in Guanzhong Basin at this time, with 68.9% of the groundwater unfit for drinking. Class Ⅱ and Ⅲ water is mainly distributed in some areas to the south, west, and north of the Guanzhong Basin. Class Ⅳ water is mainly distributed around the Weihe River, and in Gaoling County, Jingyang County, and Qian County. Class Ⅴ water is mainly distributed throughout the counties of Dali, Pucheng, Fuping, Sanyuan and Liquan, Yanliang District and surrounding areas of Xianyang City. This dataset will provide a geochemical indicator reference for studying the cyclical evolution of groundwater in the Guanzhong Basin.
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Table 2. Quality Evaluation Statistics of Groundwater in the Guanzhong Basin (excluding blank samples)
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Table 3. Salinity Statistics of Groundwater in the Guanzhong Basin (excluding blank samples)
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Table 4. Test Indicator Samples of the Inorganic Index Dataset of Groundwater of Guanzhong Basin
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