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Related Concept Videos

Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

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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...
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Distributed loads are a common type of load that engineers and scientists encounter in various practical situations. Distributed loads often refer to a type of load spread over a surface or a structure and can be modeled as continuous force per unit area.
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Resultant of a General Distributed Loading01:13

Resultant of a General Distributed Loading

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While designing structures exposed to non-uniform loads, it is crucial to consider the resultant force and its location. This resultant force is a single vector representing the net force applied due to the distributed load.
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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.
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Beams are structural elements commonly employed in engineering applications requiring different load-carrying capacities. The first step in analyzing a beam under a distributed load is to simplify the problem by dividing the load into smaller regions, which allows one to consider each region separately and calculate the magnitude of the equivalent resultant load acting on each portion of the beam. The magnitude of the equivalent resultant load for each region can be determined by calculating...
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Related Experiment Video

Updated: Sep 23, 2025

Use of Principal Components for Scaling Up Topographic Models to Map Soil Redistribution and Soil Organic Carbon
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A Load-Carrier Perspective Method for Evaluating Land Resources Carrying Capacity.

Wenzhu Luo1,2, Liyin Shen2,3, Lingyu Zhang2

  • 1School of Economics and Management, Chongqing University of Posts and Telecommunications, Chongqing 400065, China.

International Journal of Environmental Research and Public Health
|May 14, 2022
PubMed
Summary

Evaluating land resources carrying capacity (LRCC) is crucial to prevent irreversible damage. This study introduces a new "load-carrier" method to assess LRCC, revealing overloaded regions in Chongqing.

Keywords:
carrier and load perspectiveevaluationland resources carrying capacity (LRCC)multifunctional land use

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Area of Science:

  • Environmental Science
  • Ecology
  • Resource Management

Background:

  • Unsustainable population pressure on land resources can lead to irreversible environmental damage.
  • Accurate evaluation of land resources carrying capacity (LRCC) is essential for sustainable development.
  • Existing methods for LRCC assessment require improvement to address regional land pressures.

Purpose of the Study:

  • To develop and present a novel "load-carrier" perspective method for assessing regional land resources carrying capacity (LRCC).
  • To determine the components of land resource "carriers" and "loads" using the theory of multifunctional land use.
  • To demonstrate the applicability and effectiveness of the proposed LRCC evaluation method through a case study.

Main Methods:

  • Developed a "load-carrier" framework to analyze the relationship between human activity pressure and land resource supply capacity.
  • Applied the theory of multifunctional land use to define the constituents of land resource carriers and loads.
  • Conducted a case demonstration in nine county-level regions of Chongqing to evaluate LRCC.

Main Results:

  • The "load-carrier" perspective method effectively determined LRCC values in the case study regions.
  • Multifunctional land use theory successfully defined the composition of land resource carriers and loads.
  • Results indicated that seven regions in Chongqing are overloaded, and two are nearing their LRCC limits.

Conclusions:

  • The "load-carrier" method provides an effective approach for evaluating regional LRCC.
  • The integration of multifunctional land use theory enhances the assessment of land resource carriers and loads.
  • Findings offer critical insights for local governments to implement policies for managing human activities and ensuring land resource sustainability.