The Hydrological Response to Different Land Use Scenarios in the Minjiang River Basin

WANG Yushuang; CHEN Yunzhi; LU Wenfang; TIAN Yang

doi:10.13870/j.cnki.stbcxb.2020.06.005

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The Hydrological Response to Different Land Use Scenarios in the Minjiang River Basin

更新时间：2025-03-12

- The Hydrological Response to Different Land Use Scenarios in the Minjiang River Basin
- Vol. 34, Issue 6, Pages: 30-36(2020)
- 作者机构：
  
  福州大学空间数据挖掘和信息共享教育部重点实验室, 卫星空间信息技术综合应用国家地方联合工程研究中心, 数字中国研究院(福建),福州,350108
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.06.005
  CLC： P334
- Published：2020
- 稿件说明：
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WANG Yushuang, CHEN Yunzhi, LU Wenfang, et al. The Hydrological Response to Different Land Use Scenarios in the Minjiang River Basin[J]. 2020, 34(6): 30-36.
DOI：

WANG Yushuang, CHEN Yunzhi, LU Wenfang, et al. The Hydrological Response to Different Land Use Scenarios in the Minjiang River Basin[J]. 2020, 34(6): 30-36. DOI： 10.13870/j.cnki.stbcxb.2020.06.005.

摘要

通过构建适用于闽江流域的SWAT分布式水文模型，结合情景设置法，分别模拟研究区内不同土地利用情景下的径流过程，以定量分析土地利用变化对流域径流影响。结果表明：（1）经过参数率定的SWAT模型，率定期和验证期的评价指标R2>0.9，NSE>0.8，|PBIAS|<10%，符合模型径流模拟要求，在闽江流域具有良好的适用性；（2）相比闽江流域现状土地利用情景，耕地储备、建设开发情景下流域年均径流量分别增加12.41%，22.89%；植被恢复、分区调控情景下流域年均径流量减少4.09%，1.61%，林地和草地类型能有效减缓地表径流，减小径流年际变化量，而耕地、建设用地类型产流作用明显；（3）结合涵养指数值及丰、枯水期月均径流模拟结果分析，研究流域内林地和草地类型涵养水源、调节径流功能显著，耕地和建设用地类型径流调节能力较差，但前者水源涵养能力相对优于后者；（4）以"闽西北区合理开发耕地，保护森林，闽东北区推广坡度工业"为依据设置的分区调控情景，既能有效减缓与调节流域径流，又能保证区域粮食产量与促进经济发展，实现生态效益与经济效益统一，为闽江流域科学高效、可持续的土地利用规划提供参考。

Abstract

In order to quantitatively analyze the impact of land use changes on runoff in the Minjiang River basin

combined with the scenario setting method

SWAT model was constructed to simulate the runoff process under different land use scenarios in this study. The results showed that: (1) The parameterized SWAT model had good applicability to runoff simulation in the Minjiang River Basin with the evaluation indexes R2>0.9

NSE>0.8

|PBIAS|<10% at calibration and validation periods. (2) When the current land use was set as the reference

the annual runoff increased by 12.41%

22.89% for the farmland reserve scenario and construction development scenario respectively

and decreased by 4.09%

1.61% under the vegetation restoration scenario and zoning scenario

indicating that the forestland and grassland had the stronger mitigation effect on the runoff and reduced the inter annual variation of runoff

while farmland and construction land increased the runoff. (3) Combined with the value of conservation index and the simulation results of monthly average runoff in wet reason and dry periods

it was studied that the forestland and grassland had the stronger capacity of reserving water and regulating runoff

while that of farmland and construction land was weak

but the former was better than the latter. (4) Based on the "reasonable development of farmland and protection of forest in the north of West Fujian

and the promotion of ‘slope industry’ in the north of East Fujian"

the zoning scenario could not only effectively decrease and regulate the runoff of the Minjiang River basin

but also ensure the grain safety and economic development

realize the unity of ecological and economic benefits

and provide reference for the scientific

efficient and sustainable land use planning of the basin.

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