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| 河北省浅层地下水超采区土地休耕适宜性评价 |
| Suitability evaluation of land fallow in shallow groundwater overexploitation area of Hebei Province |
| 投稿时间：2021-08-31 |
| DOI：10.13254/j.jare.2021.0579 |
| 中文关键词: 休耕，河北省，地下水超采区，适宜性评价，变异系数法，水文模拟 |
| 英文关键词: land fallow, Hebei Province, groundwater overexploitation area, suitability evaluation, variation coefficient method, hydrological simulation |
| 基金项目:国家自然科学基金项目（41807183） |
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| 中文摘要: |
| 适当休耕是促进农业资源可持续利用的重要措施之一，在我国最典型的地下水超采区定量综合分析土地休耕适宜性的空间分布，可为合理有序推进耕地休养生息政策、促进区域水资源生态修复提供科学参考。本研究从地下水生态修复、粮食作物产量与社会经济稳定3个方面选取了8个指标因子，以河北省太行山山前平原区445个乡镇为评价单元，首先对各指标进行了单因子评价，然后利用变异系数法计算获得指标权重，进而得到土地休耕适宜性综合评价结果，并将其划分为四个等级进行分析。结果表明，河北省太行山山前平原土地休耕适宜性程度整体较高，仅有10.4%的耕地不适宜休耕，集中分布于研究区中北部的保定和石家庄的部分乡镇；有39.6%的耕地表现为休耕的一般适宜性，整体分布较为分散，但有一部分乡镇集中于石家庄东部；非常适宜和比较适宜休耕的耕地共占研究区总耕地面积的50.0%，在靠近太行山的研究区西侧沿京广线带状分布，特别是在邯郸、邢台的市区周边分布较多，综合考虑更好的地下水涵养效果以及尽可能减少休耕带来的粮食产能损失和劳动力闲置问题，建议优先在这些区域进行休耕制度的试点研究与推广工作。研究结果可为该区域亟需治理浅层地下水超采问题的井灌农区科学制定合理有序的休耕制度提供参考依据。 |
| 英文摘要: |
| The cultivated land fallow scheme is an important measure for promoting the sustainable utilization of agricultural resources. Quantitative and comprehensive analysis of the spatial distribution of fallow suitability in the most typical groundwater overdraft area in China could provide scientific reference for water and land resource management. In this study, eight index factors were selected from three aspects of groundwater ecological restoration, grain crop yield, and socio-economic stability to conduct a suitability evaluation. The evaluation units were set at 445 townships in the study area. First, a single factor evaluation of each index was carried out, and then the coefficient of variation method was used to calculate the weight of the indices. Based on these, the comprehensive evaluation results of land fallow suitability were obtained and divided into four levels for further analysis. The results showed that the suitability of land fallow in the piedmont plain of Taihang Mountain in Hebei Province was comparatively high. Only 10.4% of the cultivated land area was unsuitable for land fallow, which concentrated in some towns of Baoding and Shijiazhuang in the north-central part of the study area. A total of 39.6% of the cultivated land area was suitable for the fallow scheme, mainly distributed dispersedly throughout the study area, but some towns were concentrated in the eastern part of the Shijiazhuang area. The most suitable and relatively suitable cultivated land areas of the fallow scheme accounted for 50.0% of the total cultivated land in the study area. It exhibited characteristics of zonal distribution along the Beijing-Guangzhou railway on the western side of the study area near the Taihang Mountain, especially in Handan and Xingtai cities. Based on the comprehensive consideration of improving groundwater conservation effects and minimizing the loss of grain production capacity and labor idleness caused by the fallow, it is recommended to prioritize the pilot research and promotion of the fallow system in these regions. The results can provide scientific reference for the formulation of a reasonable arable land fallow system in the piedmont plain of the Taihang Mountains in Hebei Province to solve the urgent issue of shallow groundwater overdraft. |
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