对影响未排污城市便物流空间模式的因素进行分析
M Sufia Sultana1, Toby Waine2, Niamul Bari3
1Cranfield Water Science Institute, Cranfield University, Bedfordshire, UK.
The Science of the total environment
|April 18, 2025
概括
识别未下水道城市的卫生风险热点至关重要. 这项研究绘制了孟加拉国拉贾希的便流动模式,突出了影响城市卫生管理和公共卫生干预的关键因素.
科学领域:
- 环境工程 环境工程
- 公共卫生 公共卫生
- 城市规划 城市规划
背景情况:
- 低收入和中等收入国家的未经排污的城市面临着关键的卫生管理挑战.
- 目前,确定便污泥管理的特定风险热点和干预区域尚不清楚.
- 像孟加拉国拉贾沙希这样的二级城市代表着面临这些卫生问题的全球人口.
研究的目的:
- 开发和应用一个原型模型,用于绘制 Rajshahi 城市便流的空间图案.
- 通过敏感性分析和多种场景来描述模型中的不确定性.
- 确定影响便流动模式的关键因素,以指导未来的数据收集和改进城市卫生模式.
主要方法:
- 利用原型模型绘制 Rajshahi 城市的空间便流动模式.
- 进行了敏感性分析,使用多个可信的场景来解决模型的不确定性.
- 确定了五个主要影响因素:污水池排空,浸泡坑使用,排水污泥清除,建筑类型的便产量和所存在.
主要成果:
- 便流动模式被绘制成地图,提供了对拉贾沙希的卫生风险的见解.
- 灵敏度分析显示,这五个已识别的因素总体影响了模型结果近50%.
- 该模型存在显著的不确定性,强调需要更好的影响因素数据.
结论:
- 了解污水池排空,浸泡坑使用,排水污泥,建筑类型和所供应的空间模式对于有效的城市卫生是必不可少的.
- 该研究为改善城市卫生管理和公共卫生研究提供了关键的见解,包括废水监测和疾病动态.
- 未来的建模工作必须解决已确定的不确定性领域,以提高卫生管理工具的准确性和实用性.
相关概念视频
01:29Assessment of the Gastrointestinal System II: Health Perception Pattern
57
Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
Health Perception Patterns
Health perception patterns offer valuable insights into a patient's lifestyle habits and how they may impact their GI health. These patterns include:
57
01:26Feces Formation and Defecation
331
After spending 3 to 10 hours in the large intestine, chyme loses a lot of water and becomes feces, the final product of digestion. Feces consist of undigested dietary fiber such as cellulose, mucus, sloughed-off epithelial cells, and microbes. The descending and sigmoid colon stores feces and uses haustral contractions to dry it out but retains enough water to give it a semi-solid texture.
The mass peristalsis then pushes the feces into the rectum, which stretches the rectal walls to activate...
The mass peristalsis then pushes the feces into the rectum, which stretches the rectal walls to activate...
331
01:23Plane Potential Flows
173
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
Uniform...
173
01:07Conservation of Mass in Fixed, Nondeforming Control Volume
740
The principle of conservation of mass is fundamental in fluid dynamics and is crucial for analyzing flow within fixed control volumes, such as pipes or ducts. This principle states that the total mass within a control volume remains constant unless altered by the inflow or outflow of mass through the control surfaces. This results in a vital relationship for steady, incompressible flow where the mass entering a system equals the mass leaving it.
In the case of a sewer pipe, which can be modeled...
In the case of a sewer pipe, which can be modeled...
740
01:23Introduction to Types of Flows
738
Fluid flows are categorized by dimensionality and behavior, with one-dimensional flow being the simplest form, where properties like velocity and pressure change only along a single axis. Water moving through straight pipes exemplifies this flow type, as variations in other directions are minimal. One-dimensional analysis helps simplify understanding such flows, focusing solely on changes along the pipe's length.
Two-dimensional flow involves changes in both length and height, as seen in...
Two-dimensional flow involves changes in both length and height, as seen in...
738
01:22Eulerian and Lagrangian Flow Descriptions
902
Fluid flow analysis is critical in many scientific and engineering disciplines, and two principal approaches are used to describe this flow: the Eulerian and Lagrangian methods. These methods offer different perspectives on monitoring and analyzing the motion of fluids, each with distinct advantages depending on the scenario.
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
902