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Related Concept Videos

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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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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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  1. Home
  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Agriculture, Land And Farm Management
  9. Agricultural Hydrology
  11. Evaluating The Impact Of Agricultural Abandonment On Flood Mitigation Functions.
  1. Home
  3. Research Domains
  5. Agricultural, Veterinary And Food Sciences
  7. Agriculture, Land And Farm Management
  9. Agricultural Hydrology
  11. Evaluating The Impact Of Agricultural Abandonment On Flood Mitigation Functions.

Related Experiment Video

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Evaluating the impact of agricultural abandonment on flood mitigation functions.

Takeshi Osawa1, Takaaki Nishida2, Takashi Oka3

  • 1Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minami-Osawa 1-1, Hachiouji, Tokyo, 192-0397, Japan. arosawa@gmail.com.

Scientific Reports
|June 12, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Agricultural land abandonment in Japan shows little impact on flood mitigation functions. Conserving farmland is vital for Ecosystem-based Disaster Risk Reduction (Eco-DRR), even if unused.

Keywords:
Eco-DRREcosystem serviceFloodsGreen infrastructure

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Area of Science:

  • Environmental Science
  • Agricultural Science
  • Disaster Risk Reduction

Background:

  • Agricultural ecosystems play a vital role in Ecosystem-based Disaster Risk Reduction (Eco-DRR), particularly in flood mitigation.
  • Increasing agricultural land abandonment, especially in developed nations, raises concerns about the potential loss of these crucial Eco-DRR functions.
  • Understanding the impact of abandonment on specific functions like water retention (paddy fields) and infiltration (dry farmlands) is essential.

Purpose of the Study:

  • To investigate the relationship between agricultural land abandonment and flood mitigation functions in central Japan.
  • To analyze how varying abandonment ratios affect flood frequency in different agricultural land types.
  • To provide evidence-based recommendations for land management concerning abandoned agricultural areas.
Seminatural ecosystem

Main Methods:

  • The study analyzed flood frequency data in relation to abandonment ratios across 132 municipalities in Japan.
  • Specific focus was placed on paddy fields, assessing water retention capacity, and dry farmlands, evaluating water infiltration.
  • Statistical analysis was employed to determine the correlation between abandonment and flood mitigation effectiveness.

Main Results:

  • Agricultural land abandonment demonstrated minimal to no significant impact on the flood mitigation capabilities of both paddy fields and dry farmlands.
  • In paddy fields, high modernization levels or low abandonment rates may preserve or even enhance Eco-DRR functions.
  • Abandonment in dry farmlands did not appear to impair essential infiltration functions, thus maintaining flood mitigation capacity.

Conclusions:

  • Conserving agricultural land, irrespective of its abandonment status, is beneficial for maintaining Ecosystem-based Disaster Risk Reduction functions.
  • Land managers should prioritize the preservation of abandoned agricultural areas, discouraging conversion to residential zones or the installation of artificial structures.
  • The findings underscore the inherent resilience of agricultural landscapes in supporting disaster risk reduction efforts.