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基于Mann-Kendall检验的盐渍化灌区排水变化规律研究—以河套灌区为例
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基于Mann-Kendall检验的盐渍化灌区排水变化规律研究—以河套灌区为例
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基于Mann-Kendall检验的盐渍化灌区排水变化规律研究—以河套灌区为例
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Journal Article
基于Mann-Kendall检验的盐渍化灌区排水变化规律研究—以河套灌区为例
2025
Overview
【目的】从非常规水资源化利用角度出发，探究盐渍化灌区农田排水变化规律，为灌区排水资源化利用提供基础支撑。【方法】基于河套灌区2006—2020年排水量和排水矿化度，应用Mann-Kendall趋势检验法分析了研究区解放闸、永济及义长灌域排水量和排水矿化度时空分布特征和变化趋势，采用Spearman相关分析研究了3个灌域年排水量和排水矿化度关系。【结果】时间分布上，研究区3个灌域2006—2020年排水量均呈上升趋势；解放闸灌域排水矿化度呈平稳态势，永济和义长灌域排水矿化度呈下降趋势；3个灌域的年排水量和排水矿化度的相关系数ρ分别为-0.02、-0.81、-0.81，解放闸灌域的月排水量和排水矿化度弱负相关，永济和义长灌域的月排水量和排水矿化度高度负相关；各灌域月排水量和排水矿化度变化显著。空间分布上，义长灌域年排水量大，解放闸灌域次之，永济灌域相对较小，其值分别为2.492亿、1.897亿、1.305亿m3；永济和义长灌域年排水矿化度在2014年之前高于解放闸灌域，之后均低于解放闸灌域。【结论】盐渍化灌区排水资源化利用应在综合考虑排水量与排水矿化度基础上，结合不同地区种植作物耐盐性、土壤特性等采取适宜的分级利用方式，以便达到排水资源的最优利用。
Publisher
Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
