Related Experiment Video
Updated: May 17, 2025
11:53
Spatial Multiobjective Optimization of Agricultural Conservation Practices using a SWAT Model and an Evolutionary Algorithm
Published on: December 9, 2012
12.9K
Research on low-Impact development layouts in old urban residential communities based on multi-objective optimization
Fuqin Liu1, Yijun Fan1, Xinran Liu1
1School of Civil Engineering, Architecture, and Environment, Hubei University of Technology, Wuhan, Hubei, China.
Plos One
|May 13, 2025
Summary
This study optimized sponge city transformations in old residential areas. Runoff reduction increases with cost, but offers diminishing returns above 1.4 million yuan, balancing budget and land use is key.
Area of Science:
- Urban planning
- Environmental engineering
- Water resource management
Background:
- Sponge city transformations in old urban areas face challenges like poor drainage and limited renovation space.
- Optimizing these transformations requires balancing multiple objectives.
Purpose of the Study:
- To investigate optimal low-impact development (LID) strategies for old residential communities in Beijing.
- To identify trade-offs between construction costs, runoff reduction, and drainage system performance.
Main Methods:
- Utilized the Storm Water Management Model (SWMM) integrated with the Non-dominated Sorting Genetic Algorithm II (NSGA-II).
- Optimized LID layout considering construction costs, runoff reduction, node overload time, and maximum LID area constraints.
Main Results:
- A Pareto optimal curve was identified, showing runoff reduction rate is proportional to construction cost.
- Runoff reduction benefits plateau when construction costs exceed 1.4 million yuan.
- Increased construction costs and runoff reduction correlate with decreased average node overload time.
Conclusions:
- Selecting transformation schemes requires balancing budget, land use, and desired runoff reduction.
- The study provides a framework for cost-effective sponge city upgrades in similar urban settings.
Related Concept Videos
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
33
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...
33
01:19Design Example: Maintaining Level of an Embankment
44
Constructing a roadway embankment over uneven terrain requires precise leveling to ensure stability and proper drainage. Surveyors use a leveling instrument and staff to calculate ground elevations and determine the required fill material at each point along the embankment alignment.The process begins by positioning a leveling instrument near a benchmark with a known elevation. A backsight reading establishes the instrument height, which serves as a reference for subsequent measurements. A...
44
01:26Design Example: Sustainability in Concrete Building
145
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
145
01:14Design Example: Managing Concrete Workability
65
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
65
01:25Design Example: Designing a Residential Plumbing System
259
The design of residential plumbing systems requires carefully evaluating water demand, flow rates, and pressure dynamics to ensure both efficiency and reliability. The nature of water flow within pipes is defined by its Reynolds number, which classifies flow as either laminar (smooth) or turbulent.
259
01:22Design Consideration
169
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
The factor of safety is another key...
169