| 引用本文: | 冯宝平,梁 行,曾 灼.基于SWAT模型的济南南部山区土地利用优化研究[J].灌溉排水学报,2018,37(5):121-128. |
| FENG Baoping,LIANG Xing,ZENG Zhuo.基于SWAT模型的济南南部山区土地利用优化研究[J].灌溉排水学报,2018,37(5):121-128. |
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| 摘要: |
| 【目的】维护南部山区水源补给区良好的水循环条件和功能并建设济南水生态文明城市。【方法】应用SWAT分布式水文模型，选择Re、Ens和R2三项指标进行模型率定分析，再以20 km2为步长模拟土地利用变化与径流和泥沙的关系，在此基础上建立以水文、水保和经济为目标的多目标土地利用结构优化模型。【结果】SWAT模型3项率定指标均满足要求，模型对研究区的径流和泥沙模拟具有较好的适用性；年径流变化量和年泥沙变化量与土地利用转化面积关系可以用二次函数式表示，单位面积林地转变为建设用地时，径流和泥沙流失量增加最大，草地转变为建设用地和耕地对径流影响最小，耕地转变为建设用地对泥沙流失影响最小；现状年和规划年的土地利用结构还应该进一步优化，林地、草地、耕地和建设用地面积分别为370.70、158.35、375.92和45.21 km2，为最优土地利用结构。【结论】模型在济南南部山区适用性良好，能为南部山区合理利用土地资源、保护生态环境，保证济南水生态文明城市建设提供决策依据。 |
| 关键词: 南部山区； SWAT模拟； 土地利用结构； 多目标优化 |
| DOI：10.13522/j.cnki.ggps.2017.0546 |
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| Optimizing Land Usage in Southern Mountain Areas of Jinan Based on the SWAT Model |
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FENG Baoping, LIANG Xing, ZENG Zhuo
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Hohai University, Nanjing 210098, China
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| Abstract: |
| 【Objective】 The discharge of water and sediments in a catchment is impacted by its land use and the objective of this paper is to investigate the feasibility of changing land usage to improve water cycling and functions in Southern Mountain Region with a view to make the City of Jinan more ecologically sustainable. 【Method】 We first simulated the response of runoff and sediment transport to land use change using the SWAT model at spatial resolution of 20 km2; the accuracy of the model was assessed by index Re, Ens and R2. We then developed a multi-objective optimization model for land use by minimizing the runoff and sediment discharge and maximizing economic benefit. 【Result】① The three indexes, Re, Ens and R2 were satisfactory, indicating that SWAT was capable of simulating runoff and sediment in this region. ②The dependence of runoff and sediment discharge on change of land use within a unit area could be described by a quadratic function. While converting forest to building sites increased runoff and sediment discharge, the impact of converting grassland to building sites and cropland was limited. ③ In terms of reducing runoff and sediment discharge, the optimal areas for forest, pasture, cropland and land for buildings in this region were 370.70 km2, 158.35 km2, 375.92 km2 and 45.21 km2 respectively. 【Conclusion】 The results calculated using the optimization model in this paper can help improve land usage, protect ecological environment and ensure sustainability of the City of Jinan. |
| Key words: southern mountain area; SWAT model; land usage; multi-objective optimization |
