使用SWAT进行水文建模,以评估甘河流域的流动动力学
Kunal Chakraborty1, Snehasish Saha2, Debasish Mandal2
1Department of Geography & Applied Geography, University of North Bengal, Darjeeling, 734013, West Bengal, India. kunalgeo92@nbu.ac.in.
概括
精确的流量估计对于水资源管理至关重要,尤其是跨境河流. 这项研究成功地使用了土壤和水评估工具 (SWAT) 在甘河流域进行水文建模,显示了高精度.
科学领域:
- 水文学的水文学
- 环境科学 环境科学
- 水资源管理 水资源管理
背景情况:
- 全球人口增加,工业化和人类活动加剧了人们对水资源供应的担忧.
- 在河流盆地尺度上准确的流量估计是至关重要的,但具有挑战性,特别是在因水冲突而缺乏数据的跨境河流.
- 传统的降雨排水模型往往难以满足时空数据的要求.
研究的目的:
- 为了应对数据稀缺的跨境河流盆地的流量估计的挑战.
- 应用土壤和水资源评估工具 (SWAT) 用于利用高分辨率的地理空间数据进行水文建模.
- 通过先进的水文建模,评估甘河流域的水资源供应.
主要方法:
- 使用土壤和水资源评估工具 (SWAT) 进行水文建模.
- 集成的高分辨率遥感和地理信息系统 (GIS) 数据作为输入.
- 校准和验证模型输出,使用来自全球流水数据中心 (GRDC) 的观测流量数据.
主要成果:
- 土壤和水资源评估工具 (SWAT) 在甘河流域的降雨流量建模中表现出高效率.
- 在十个站点使用纳什-萨特克利夫效率 (NSE),百分比偏差 (PBIAS),确定系数 (R2) 和RSR措施来评估模型性能.
- 测定系数 (R2) 值在八个站点中从0.82到0.93不等,表明模型性能强.
结论:
- 该研究成功地实施了SWAT,用于准确的水文建模和甘河流域的流量估计.
- 经过验证的模型提供了一种可靠的方法来评估水的可用性,即使数据有限.
- 这些发现为水资源规划师和地理学家提供了宝贵的资源,用于明智的决策和未来的研究.
相关概念视频
Design Example: Creating a Hydraulic Model of a Dam Spillway
157
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
157
Typical Model Studies
354
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
354
Modeling and Similitude
261
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
261
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
42
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
42
Applications of GIS: Disaster Management and Emergency Response
65
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
65
Rapidly Varying Flow
57
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
57


