相关实验视频
Updated: Jun 21, 2025
12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.0K
通过使用系统动态建模,追踪和管理地下水灌区的水-食物-环境-生态系统 (WFEE) 联系
Chiheng Dang1, Hongbo Zhang2, Vijay P Singh3
1School of Water and Environment, Chang'an University, Xi'an 710054, China.
The Science of the total environment
|July 13, 2024
概括
本研究介绍了一种系统动态模型,用于管理地下水灌区的水-食物-环境-生态系统 (WFEE) 联系. 它为农民提供关于可持续农业实践的决策支持.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 系统生态学 系统生态学
背景情况:
- 地下水灌区面临着水资源短缺,污染和生态退化等重大挑战.
- 这些问题与由农业活动驱动的复杂的水-食物-环境-生态系统 (WFEE) 联系有关.
- 可持续发展需要科学评估和农民层面的法规,以实现WFEE的联系.
研究的目的:
- 为地下水灌区的WFEE连接开发一个科学表征和评估框架.
- 创建一个映射网络,将区级指标转化为农民级管理目标.
- 为农民提供决策支持,以加强WFEE连接健康.
主要方法:
- 开发了一个映射网络,将灌区的指标与农民层面的管理目标联系起来.
- 创建了一个系统动态模型来模拟WFEE结合和农民活动中的相互作用.
- 该模型包含目标,状态,监管和评估参数,用于全面管理.
主要成果:
- 开发的模型准确地描述了地下水灌区的WFEE连接和农民活动关系.
- 该模型表现出对各种改进策略的强烈响应,包括种植调整和改进的灌方法.
- 该系统为农民提供了有效的决策支持,帮助他们管理农业实践并解决WFEE关联问题.
结论:
- 拟议的系统动态模型为管理地下水灌区域的WFEE连接提供了一个强大的工具.
- 从模型中获得的量身定制的管理策略可以有效地解决农民层面的可持续性挑战.
- 这种方法支持明智的决策,以提高地下水灌区的健康和可持续性.
相关概念视频
01:27Design Example: Design of an Irrigation Channel
90
Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
90
01:12Modeling 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
01:29Gradually Varying Flow
41
Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...
41
02:41Responses to Drought and Flooding
10.6K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.6K
01:30Typical 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
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
43
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...
43