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土地使用土地覆盖变化对Punpun河流域水文反应的影响
Shashi Ranjan1, Vivekanand Singh2
1Department of Civil Engineering, National Institute of Technology Patna, Patna, Bihar, 800005, India.
Environmental monitoring and assessment
|September 1, 2023
概括
在Punpun河流域的土地利用变化增加了蒸发和表面下水. 农业扩张显著影响了水平衡,导致地下水贡献减少,尽管水产增加.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 水资源管理 水资源管理
背景情况:
- 土地使用土地覆盖面 (LULC) 变化显著影响水文过程.
- 了解这些影响对于河流流域的可持续水资源管理至关重要.
- 邦邦河流域面临着LULC动态,需要进行水文评估.
研究的目的:
- 评估从1995年到2020年在Punpun河流域对LULC变化的水文反应.
- 在不同的LULC场景下分析水平衡组件.
- 量化LULC变化对溪流,蒸发和地下水的影响.
主要方法:
- 使用了与地理信息系统 (GIS) 集成的土壤和水评估工具 (SWAT) 模型.
- 雇佣的高分辨率格式降雨量和温度数据 (1995-2020年).
- 开发了基于5年LULC间隔的5个SWAT模型;校准 (1995-2015) 和验证 (2016-2020) 每日流量数据.
主要成果:
- 模拟流量表现良好,R2=0.72,NSE=0.68 (校准) 和R2=0.93,NSE=0.77 (验证) 的表现良好.
- 蒸发透气 (ET) 增加了7.01%,这是由于农业面积增加了21.86%.
- 表面下水,水产和建筑面积分别增加了14.43%,17.40%和9.14%,而地下水的贡献减少了.
结论:
- LULC的变化,特别是农业扩张,已经显著改变了Punpun河流域的水文制度.
- 增加的农业活动导致了更高的蒸发和地表冲水,影响了整体的水资源供应.
- 该研究强调需要综合土地和水资源管理战略,以减轻负面水文后果.
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