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Updated: Jul 20, 2025

Watershed Planning within a Quantitative Scenario Analysis Framework
12:44

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Published on: July 24, 2016

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小型和中型河流不同部分的恢复效果的评估方法:中国青河的案例研究

Mengshuo Liu1, Ziyao Hao2, Tanja Radu3

  • 1School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450001, PR China; School of Life Science and Institute of Wetland Ecology, Nanjing University, Nanjing, 210000, PR China.

Environmental research
|August 1, 2023
PubMed
概括

一种新的河流恢复评估方法结合了自然和社会因素,改善了对城市和农村河流段的评估. 这种方法确定了维护需求,增强了长期的河流健康和污染控制工作.

关键词:
河流流域类型的分类索引权重优化优化指数权重优化青河是青河的一部分.恢复效应评价 恢复效应评价小型和中型的河流.

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Typical Model Studies

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.
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment

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...
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Design Example: Design of an Irrigation Channel

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...
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Design Example: Creating a Hydraulic Model of a Dam Spillway

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Quality of Water01:19

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
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