Research on the Audit Rules for National Mountain Flood Disaster Survey and Evaluation Results of Key Towns and Villages

Water, Journal Year: 2025, Volume and Issue: 17(6), P. 773 - 773

Published: March 7, 2025

In recent years, there have been frequent extreme weather events that defy traditional understanding. Specifically, mountain flood disasters can cause significant loss of life due to their sudden onset and destructive power. The 7.21 event in Xingyang, Zhengzhou, China, recorded a maximum 6 h precipitation 240.5 mm the Suo River basin, corresponding 500-year return period, causing fatalities substantial damage. central government China has launched supplementary disaster surveys evaluations involving key towns villages, following an initial round riverside improve foresight response capabilities for risks under conditions. This paper introduces contents national elaborating on principles, content, rules auditing survey evaluation results. innovatively proposes professional audit criteria, such as early warning indicators, monitoring facility correlations, hazard zoning, based formal data quality. implementation criteria improved accuracy by 85% reduced false alarms 40%, enhancing overall effectiveness prevention. analysis results suggests are scientific, reasonable, effective, achieving expected goals quality control. approach effectively enhance practical value outcomes towns, laying solid foundation transforming prevention from merely “existing” “optimal”.

Language: Английский

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Modelling of rainwater reduction and hydrological performance of selected green infrastructure (GI) facilities in urban catchments

Ochrona Srodowiska i Zasobów Naturalnych - Environmental Protection and Natural Resources, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Abstract Currently, effective rainwater management in urban areas requires a modern and comprehensive approach, with mathematical modelling methods at its foundation. The aim of this study was to estimate the impact use dispersed green infrastructure (GI) – specifically, drainage-equipped rain gardens (bio-retention cells, or BC) their operational hydrological performance on scale an catchment, particularly reducing amount discharged directly receiver. An additional objective determine relationship between total inflow per unit area capacity percentage reduction individual BC facilities. In research, hydrodynamic single-event precipitation model built calibrated for existing housing estate Cracow (Poland) using Storm Water Management Model (SWMM). functioning GI is represented by Low Impact Development (LID), which simulated number scenarios (S 0 –S 7 ) durations 4.2, 15, 30, 45, 60, 90, 120 180 minutes, probability occurrence p = 10% (indicating chance any given year). results demonstrated significant potential peak flow average 94%, volume 86%, all outfall entire system. Analysis facilities revealed reductions ranging from 67% 95% facilities, depending duration rainfall. Notably, more were observed cases short, intense analysis highest efficiency showed that maximum values 1 m 2 surface area, reduced 100% inflow, occurred during heavy rainfall 15 min amounted 29.72 L/m (average 5.79 ).

Language: Английский

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Urban Flood Risk Assessment and Mapping Using GIS-DEMATEL Method: Case of the Serafa River Watershed, Poland

Water, Journal Year: 2024, Volume and Issue: 16(18), P. 2636 - 2636

Published: Sept. 17, 2024

This paper develops a method integrating Geographic Information Systems (GIS) and the Decision-Making Trials Evaluation Laboratory (DEMATEL) for analysis of factors influencing urban flood risk identification flood-prone areas. The is based on nine selected factors: land use/land cover (LULC: ratio built-up areas, greenery areas), elevation, slope, population density, distance from river, soil, Topographic Wetness Index (TWI), Normalized Difference Vegetation (NDVI). DEMATEL used to determine cause–effect relationship between factors, allowing key criteria their weights be determined. LULC density were identified as most important floods. was applied case study—the Serafa River watershed (Poland), an urbanized catchment covering housing estates cities Kraków Wieliczka frequently affected by flooding. GIS publicly available data using QGIS with obtained vulnerable 45% total area classified areas very high or level risk. results match actual inundation incidents that occurred in recent years this area. study shows potential possibility DEMATEL-GIS significance designate

Language: Английский

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An Assessment of Urban Surface Runoff Potential In Response to Human Induced Land Use Land Cover Changes in the Federal Capital City, Abuja, Nigeria

Published: Jan. 1, 2024

Language: Английский

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