Hydrogeochemical Characterization and Irrigation Quality Assessment of Shallow Groundwater in the Central-Western Guanzhong Basin, China
Hydrogeochemical Characterization and Irrigation Quality Assessment of Shallow Groundwater in the Central-Western Guanzhong Basin, China
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关中盆地中西部浅层地下水水文地球化学特征及灌溉质量评价
DOI：
10.3390/ijerph16091492
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发表时间：
2019-04
影响因子：
--
通讯作者：
Zhang Qiying
中科院分区：
文献类型：
--
作者：
Xu Panpan;Feng Wenwen;Qian Hui;Zhang Qiying
地下水是关中流域农业发展的主要水资源。本研究共采集了关中盆地中西部地区97份地下水样本，其中渭河北岸51份，渭河南岸46份。本研究的目的是研究该流域的水文地球化学特征，并确定浅层地下水是否适合灌溉。整个研究区的地下水都是碱性的。SBWR的地下水为淡水，NBWR的地下水为淡水或微咸水。除Ca2+外，SBWR样品中离子的平均浓度低于NBWR样品。研究区地下水以HCO3−为主。Ca2+在SBWR中占主导地位，Na+在NBWR中占主导地位。SBWR地下水以HCO3-Ca·Mg型为主，主要经历了岩石风化淋滤的水文地球化学过程。NBWR地下水样品的水化学相大部分为HCO3-Na型，少量为HCO3-Ca·Mg型、SO4·Cl-Na型和SO4·Cl-Ca·Mg型。其化学性质主要受岩石风化、阳离子交换和蒸发控制。通过盐度危害、钠百分比、钠吸附比、残留碳酸钠、镁危害、渗透指数、凯利比、潜在盐度、综合有害系数、灌溉系数等评价地下水灌溉质量。综合考虑这些指标的结果表明，NBWR水样适合灌溉的比例在15.7% ~ 100%之间，平均水平为56.7%。适于灌溉的小水区水样占比为78.3% ~ 100%，平均为91.8%。用这种水灌溉的土地不会受到任何碱危害，但会受到盐碱危害，这种危害在北水北调地区更为严重。因此，NBWR中的大部分水可以用于具有良好排水条件的土壤，这些土壤可以控制盐度。
Groundwater is the major water resource for the agricultural development of the Guanzhong Basin, China. In this study, a total of 97 groundwater samples (51 from the North Bank of the Wei River (NBWR) and 46 from the South Bank of the Wei River (SBWR)) were collected from the central-western Guanzhong Basin. The aim of this study was to investigate the hydrogeochemical characteristics of the basin and to determine the suitability of shallow groundwater for irrigation. The groundwater of the entire study area is alkaline. The groundwater of the SBWR is fresh water, and the NBWR groundwater is either freshwater or brackish water. The average concentration of ions (except for Ca2+) in SBWR samples is lower than in NBWR samples. HCO3− is dominant in the groundwater of the study area. Ca2+ is dominant in the SBWR while Na+ is dominant in the NBWR. The SBWR groundwater is mainly of the HCO3-Ca·Mg type, and has undergone the main hydrogeochemical processes of rock weathering-leaching. The hydrochemical facies of the majority of the NBWR groundwater samples are the HCO3-Na type with several minor hydrochemical facies of the HCO3-Ca·Mg, SO4·Cl-Na, and SO4·Cl-Ca·Mg types. Its chemistry is mainly controlled by rock weathering, cation exchange, and evaporation. Salinity hazard, sodium percentage, sodium adsorption ratio, residual sodium carbonate, magnesium hazard, permeability index, Kelley’s ratio, potential salinity, synthetic harmful coefficient, and irrigation coefficient were assessed to evaluate the irrigation quality of groundwater. The results of the comprehensive consideration of these indicators indicate that the percentage of NBWR water samples suitable for irrigation purposes ranges between 15.7% and 100% at an average level of 56.7%. Of the SBWR water samples suitable for irrigation, the percentage ranges from 78.3% to 100% with an average of 91.8%. Land irrigated with such water will not be exposed to any alkali hazard, but will suffer from a salinity hazard, which is more severe in the NBWR. Thus, most of the water in the NBWR can be used for soils with good drainage conditions which control salinity.
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DOI：
--
发表时间：
2009
期刊：
Journal of Jilin University
影响因子：
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作者：
Yang Xiao-ting
通讯作者：
Yang Xiao-ting
影响因子：
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作者：
F. M. Abdulhussein
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影响因子：
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作者：
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DOI：
10.1016/j.scitotenv.2015.10.006
发表时间：
2016-01
期刊：
The Science of the total environment
影响因子：
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作者：
M. E. Zabala;Sandra Martinez;M. Manzano;Luis Vives
通讯作者：
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影响因子：
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作者：
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Qian, Hui