相关实验视频
Updated: Jul 16, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.1K
建立基于水平衡方法的水资源保护量化评估方法框架,以时空和不同的不连续生态系统尺度为基础
Gaolei Zhao1, Shimin Tian1, Yongcai Jing1
1Henan Key Laboratory of YB Ecological Protection and Restoration, Yellow River Institute of Hydraulic Research, YRCC, Zhengzhou, 450003, China.
Journal of environmental management
|September 22, 2023
概括
节水 (WC) 对于减轻排水和补充地下水至关重要. 这项研究开发了一个框架来分析不同生态系统的WC变化,揭示了黄河源区的关键见解.
科学领域:
- 水文学的水文学
- 生态系统服务生态系统服务
- 环境科学 环境科学
背景情况:
- 水资源保护 (WC) 是一个关键的生态系统服务,面临着气候变化和人类活动带来的威胁.
- 了解各种生态系统的时空空 WC 趋势是有限的.
- 黄河源区 (SRYR) 显示生态退化和减少的WC能力.
研究的目的:
- 开发和应用一个定量评估方法框架 (QAMF) 来分析时空空间 WC 变化.
- 评估SRYR中不同不连续生态系统的WC动态.
- 为评估SRYR的WC能力提供科学支持.
主要方法:
- 使用土壤和水评估工具 (SWAT) 水文模型和SWAT校准和不确定性计划 (SWAT-CUP).
- 使用基于水平衡方法的WC计算公式.
- 应用空间分析方法,包括实证直角函数和波纹分析.
主要成果:
- 在SRYR中,SWAT模型表现出高准确度;WC公式证明适用于多时间尺度分析.
- 年度WC范围为81.00-184.13毫米,月度WC范围为-28.58-107.64毫米,每日WC反映了降水模式.
- 卫生间调节在每日尺度上最明显,在每月尺度上更少,在年度尺度上缺席.
结论:
- 关键的WC区域集中在东南SRYR,具有显著的年度周期.
- 不同的生态系统具有不同的WC能力,这突显了生物多样性对维持WC功能的重要性.
- 该QAMF为评估生态敏感地区的WC能力提供了重要的科学和技术支持.
相关概念视频
Conservation of Mass in Moving, Nondeforming Control Volume
1.1K
Stormwater detention basins are essential in managing runoff during heavy rainfall, particularly in urban areas where impervious surfaces increase the risk of flooding. Understanding the conservation of mass in these systems allows engineers to optimize basin performance, balancing inflow, outflow, and water storage.
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
1.1K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
63
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...
63
Control Volume and System Representations
1.2K
Two key frameworks are employed to analyze mass, energy, and momentum transfer: the control volume approach and the system approach. These frameworks offer different perspectives, depending on whether the focus is on a specific region in space (control volume approach) or a defined mass of fluid (system approach).
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface. For instance, in the case of water...
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface. For instance, in the case of water...
1.2K
Design Example: Creating a Hydraulic Model of a Dam Spillway
209
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.
209
Gravimetry: Overview
6.0K
Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
In precipitation gravimetry, the analyte is converted into a precipitate and weighed. For example, the silver content in a sample can be estimated by precipitating and...
6.0K
The Water Cycle
24.5K
The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.
24.5K

