Scholarlink

<p>Traditional Cascades of Minor Reservoirs (TCMR) represent sophisticated integrated water management through interconnected storage networks, combining socio-economic sustainability with traditional engineering practices. Chennai’s catastrophic 2015 floods exposed critical vulnerabilities in urban flood management, particularly the degradation of TCMR that historically regulated basin hydrology. This study quantifies flood detention capacity losses from traditional paddy field levee degradation in the Adyar Basin using field measurements and HEC-HMS modelling. Field surveys of paddy fields revealed a 52.7% decline in levee heights. This degradation eliminated 16.6 MCM of flood detention volume across 10,500 hectares of historical paddy fields, representing 55.6% capacity reduction. Combined with reservoir analysis, total basin storage decreased from 219.92 MCM to 155.90 MCM. HEC-HMS simulations show that restoring traditional levee heights could result in a minimum of 25% reduction in peak flood discharge for 100 years return period which increase further at lower return periods. Conservation of remaining paddy fields and restoration of degraded levees offer cost-effective flood mitigation while preserving cultural landscapes. These findings emphasize that wetland command areas function as critical flood infrastructure requiring conservation alongside reservoir systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sustainable Flood Management through Traditional Nature-Based Flood Detention Infrastructure: A Hydrological Assessment

  • 期刊论文

  • 发表日期：

    2026年6月22日

查看全文
  • Radhakrishna Govindarajulu Ramalingam,
  • Ravikumar Govindasamy,
  • Sudharsanan Rajagopalan

摘要

Traditional Cascades of Minor Reservoirs (TCMR) represent sophisticated integrated water management through interconnected storage networks, combining socio-economic sustainability with traditional engineering practices. Chennai’s catastrophic 2015 floods exposed critical vulnerabilities in urban flood management, particularly the degradation of TCMR that historically regulated basin hydrology. This study quantifies flood detention capacity losses from traditional paddy field levee degradation in the Adyar Basin using field measurements and HEC-HMS modelling. Field surveys of paddy fields revealed a 52.7% decline in levee heights. This degradation eliminated 16.6 MCM of flood detention volume across 10,500 hectares of historical paddy fields, representing 55.6% capacity reduction. Combined with reservoir analysis, total basin storage decreased from 219.92 MCM to 155.90 MCM. HEC-HMS simulations show that restoring traditional levee heights could result in a minimum of 25% reduction in peak flood discharge for 100 years return period which increase further at lower return periods. Conservation of remaining paddy fields and restoration of degraded levees offer cost-effective flood mitigation while preserving cultural landscapes. These findings emphasize that wetland command areas function as critical flood infrastructure requiring conservation alongside reservoir systems.