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首页> 外文期刊>International journal of soil science >Irrigation Water Quality Evaluation of Al-Mendasah Groundwater and Drainage Water, Al-Madenah Al-Monawarah Region, Saudi Arabia*
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Irrigation Water Quality Evaluation of Al-Mendasah Groundwater and Drainage Water, Al-Madenah Al-Monawarah Region, Saudi Arabia*

机译：沙特阿拉伯Al-Madenah Al-Monawarah地区Al-Mendasah地下水和排水的灌溉水质量评估*

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摘要

Groundwater and drainage water samples were collected from Al-Mendasah area. North-West of Al-Madinah Al-Munawarrah for irrigation water quality evaluation. The well waters were classified as C4S2 to C4S4 waters i.e., very high salinity and medium sodium to severely saline and very high sodium waters. The drainage waters were classified as C3S2 to C4S3 i.e., high salinity and medium sodium to severely saline and high sodium waters. The groundwater is dominated by Na and CI ions. The Saturation Indices (SI) showed that the groundwater is unsaturated with respect to anhydrite, halite, gypsum and fluorite; and saturated with respect to calcite and dolomite. The concentration of calcium is much higher than that of Mg. The nitrate contents are much higher than the reconmiended safe limits of 30 mg L~(-1) for drinking and other uses. The fluorite (F) concentration in 40% of well waters was higher than the recommended safe limits for drinking water. The strong correlation between SAR vs. adj. SAR and adj. R_as, Na vs. CI, Mg vs. CI and Mg vs. SO_4 ions indicate the dissolution and precipitation reactions in the rock-water interface that affect groundwater chemistry. The soil infiltration rate will not be affected either by well water or drainage water irrigation. Only, 12%) well waters are safe for irrigation directly without serious soil and crop production problems. The use of remaining 78% well waters requires the adoption of certain management practices such as adequate drainage, selection of salttolerant crops and application of leaching requirements.
机译：从Al-Mendasah地区收集了地下水和排水水样本。 Al-Madinah Al-Munawarrah的西北部，用于灌溉水质量评估。井水被分类为C4S2至C4S4水，即盐度很高，钠盐含量中等至盐分严重，钠盐含量很高。排水被分类为C3S2至C4S3，即高盐度和中钠至重度盐水和高钠水。地下水以Na和CI离子为主。饱和指数（SI）表明，地下水相对于硬石膏，石盐，石膏和萤石而言是不饱和的。方解石和白云石饱和。钙的浓度比镁高得多。硝酸盐含量远高于饮用水和其他用途的30 mg L〜（-1）的安全限值。 40％井水中的萤石（F）浓度高于建议的饮用水安全限值。 SAR与调整之间的强相关性。 SAR和调整R_as，Na对CI，Mg对CI和Mg对SO_4离子表明在岩石-水界面中的溶解和沉淀反应会影响地下水化学。井水或排水灌溉都不会影响土壤的渗透率。只有12％的井水可直接安全灌溉，而不会出现严重的土壤和农作物生产问题。其余78％的井水的使用需要采取某些管理措施，例如适当的排水，选择耐盐作物和实施淋洗要求。

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