相关实验视频
Updated: Sep 16, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.1K
热带,跨境的Sio Malaba Malakisi河流盆地的水质特征的时空分布,使用多变量统计技术
Hope Mwanake1, Moritz Feigl2,3, Bano Mehdi-Schulz2
1Department of Landscape, Water and Infrastructure, Institute of Hydrology and Water Management, BOKU University, Muthgasse 18, 1190, Vienna, Austria. hmwanake@gmail.com.
Environmental monitoring and assessment
|July 5, 2025
概括
在东非的表面水污染.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 热带水文学热带水文学
背景情况:
- 土地利用和土壤侵蚀导致东非热带河流流域的地表水污染.
- 跨境的Sio Malaba Malakisi河流盆地 (SMMRB) 缺乏详细的水质数据.
- 这个盆地对肯尼亚和乌干达的社会经济活动至关重要.
研究的目的:
- 在SMMRB中进行第一个长达一年的地表水质基线评估.
- 识别空间和季节性水质动态及其驱动因素.
- 为改善水资源管理策略提供数据.
主要方法:
- 在12个地点和3个水文季节 (干旱,短雨,长雨) 收集了854个水样.
- 使用美国公共卫生协会 (APHA) 协议分析了12个物理化学参数.
- 应用多变量统计:聚合层次聚类,威尔克的lambda,和探索因素分析 (EFA).
主要成果:
- 确定了三个不同的空间集群,对应于Sio,Malaba和Malakisi分捕获区,每一个都有独特的水质概况.
- 观察到总 (TP),可溶性反应 (SRP) 和总悬浮固体 (TSS) 的度高于背景水平.
- 突出季节性变化与沉积物运输和雨水季节的稀释有关.
结论:
- 这些发现为缺乏数据的热带盆地中营养物质运输和水地形学影响提供了新的见解.
- 结果支持建立有针对性的监测和适应性水资源管理策略.
- 未来的研究应该专注于长期的沉积物-营养物相互作用和保护实践的有效性.
相关概念视频
Quality of Water
195
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...
195
Testing Water Quality
190
When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
190
Multiple Regression
3.2K
Multiple regression assesses a linear relationship between one response or dependent variable and two or more independent variables. It has many practical applications.
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
Farmers can use multiple regression to determine the crop yield based on more than one factor, such as water availability, fertilizer, soil properties, etc. Here, the crop yield is the response or dependent variable as it depends on the other independent variables. The analysis requires the construction of a scatter plot...
3.2K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
105
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...
105

