相关实验视频
Updated: Jul 10, 2025
12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.0K
使用全球水质指数 (WQI) 模型评估地表水质量:河流水污染的视角
Md Habibur Rahman Bejoy Khan1, Amimul Ahsan2,3, M Imteaz4
1Department of Civil and Environmental Engineering, Islamic University of Technology, Gazipur, Bangladesh.
Scientific reports
|November 22, 2023
概括
由于工业化和城市化,Jamuna河的水质很差,需要处理才能饮用,但适合灌. 积极的监测对于环境可持续性至关重要.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 分析化学 分析化学
背景情况:
- 全球工业化和城市化正在降低地表水质量,需要为环境和人类福祉而进行保护.
- 作为一个重要的水源,Jamuna河面临着严重的质量挑战,影响其可用性.
- 现有的水质标准需要定期对国际和国家基准进行评估.
研究的目的:
- 在不同季节的五个地点评估Jamuna河的当前水质.
- 为了比较六个全球水质指数 (WQI) 在评估河水质量的有效性.
- 将WQI结果与孟加拉国环境质量标准 (EQS) 和环境部 (DoE) 标准进行对比.
主要方法:
- 根据六种WQI模型的指导方针对15个物理化学参数进行分析:加权算术WQI (WAWQI),不列颠哥伦比亚省WQI (BCWQI),加拿大环境部长理事会WQI (CWQI),分配WQI (AWQI),马来西亚WQI (MWQI) 和俄勒冈州WQI (OWQI).
- 在雨季和干季在Jamuna河沿线的五个不同的地点进行采样.
- 对WQI结果与国家标准 (EQS,DoE) 的比较分析.
主要成果:
- 大多数分析的物理化学参数在所有采样地点都超过了允许的标准值.
- 通过WQI模型,Jamuna河地区的平均水质被归类为最低的质量范围.
- 虽然不适合没有处理的饮用,但河水质量仍然足够用于灌目的.
结论:
- 人类活动,包括城市化和工业废水排放,是Jamuna河水质恶化的主要驱动因素.
- 定期监测和严格的水质管理对于缓解进一步恶化至关重要.
- 实施积极的措施至关重要,以防止恢复河流水质以可接受的标准的日益严重的困难.
相关概念视频
01:30Typical Model Studies
362
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.
362
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
50
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...
50
01:21Design Example: Creating a Hydraulic Model of a Dam Spillway
187
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.
187