耦合支持向量机和灌溉水质指数评估埃塞俄比亚塔纳次流域灌溉实践的地下水质量适宜性

IF 1.6 Q3 WATER RESOURCES Water Practice and Technology Pub Date : 2023-04-12 DOI:10.2166/wpt.2023.055
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引用次数: 1

摘要

通过监测和评价灌溉作业的地下水质量,可以实现长期和可持续的农业做法。但是,对埃塞俄比亚塔纳分流域的灌溉水质关注较少。本研究的目的是评价地下水灌溉利用的季节和空间适宜性。40个样品在干湿季节分别测定了pH、电导率(EC)、Na+、Ca2+、Mg2+、K+、Fe2+、HCO3-、CO32-、Cl−和NO3-等水质参数。采用灌溉水质指数(IWQI)和支持向量机(SVM)对地下水进行灌溉适宜性评价。结果表明,旱季和雨季灌溉适宜性分为高、中两个等级。干季和湿季地下水适宜级比例分别为72.5%和67.5%。雨季地下水相对较旱季更适宜,这是由于雨季积累的盐分淋滤所致。为避免含盐量的威胁,在旱季使用地下水时应保持警惕。本文绘制的地下水水质适宜性图有助于确定水质较好的地下水水源进行灌溉。
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Coupling support vector machine and the irrigation water quality index to assess groundwater quality suitability for irrigation practices in the Tana sub-basin, Ethiopia
Long-term and sustainable agricultural practices can be achieved through monitoring and evaluation of groundwater quality for irrigation operations. However, less attention was given to irrigation water quality in the Tana sub-basin, Ethiopia. The present study is aimed to assess the seasonal and spatial groundwater suitability for irrigation uses. The groundwater quality parameters measured in 40 samples in each dry and wet season were the pH, electrical conductivity (EC), Na+, Ca2+, Mg2+, K+, Fe2+, HCO3-, CO32-, Cl−, and NO3-. The groundwater suitability for irrigation was assessed using the irrigation water quality index (IWQI) and support vector machine (SVM). The results showed high and medium irrigation suitability classes in the dry and wet seasons. The proportion of groundwater samples in the medium irrigation appropriateness class in the dry and wet seasons, respectively, was 72.5 and 67.5%. The groundwater in the wet season is comparatively more suitable than that in the dry season, which is attributed to the leaching of accumulated salts during the wet season. To avoid a salinity threat, vigilance should be exercised when using groundwater during the dry seasons. The groundwater quality suitability map developed here for irrigation may aid in locating better-quality groundwater sources for irrigation.
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来源期刊
CiteScore
2.30
自引率
6.20%
发文量
136
审稿时长
14 weeks
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