Search

A novel model has been proposed for the methodical development and safe utilization of the lower Yellow River floodplain to provide flood control with a graded standard, sediment deposition in the partitioned zone, and the free exchange of channel runoff and sediment. The wide floodplain, which is located between the dam and the main channel, has been typically divided into three zones: high, tender, and low floodplains. Meanwhile, different ecological construction models have been suggested for each zone. This paper summarizes all related research findings; describes the overall research ideas and methodologies; expounds key issues such as land planning and utilization, sediment prediction and regulation, and multi-dimensional industrial safeguards in the lower Yellow River floodplain; and provides orientation for future research on the ecological development of the lower Yellow River floodplain. This study aims to promote the refinement of the ecological development model for the lower Yellow River floodplain and accelerate the application of research findings regarding land development and utilization of the lower Yellow River floodplain. [ABSTRACT FROM AUTHOR]

This study proposes and tests a new approach to detect and analyze changes in flood regime using a distributed hydrological model (EasyDHM), using the Second Songhua River basin, China, as a case study. Model calibration and parameter sensitivity were used to represent flood regimes in a 60-year series (1954-2013), with three different flood regime periods identified. The changes in flood regime were estimated by model parameters, flood result residuals and the overall process in the hydrological model in the three periods. The results show that human activities significantly impacted flood regimes, with significant flood regime change largely attributed to increases in water storage in multiple small reservoirs. Flood volume was reduced significantly between the periods in all three watersheds. The parameters also changed in variety between the periods. The study highlights the importance of incorporating data on small-reservoir constructions in flood control systems. [ABSTRACT FROM AUTHOR]

Flash floods cause extensive loss of property and human life. Early warning systems present a more efficient approach to flood prevention and mitigation than engineering measures. This article reviews research on flash flood early warnings in China, including long-term prediction methods based on statistical regularity and flood mechanisms, and real-time warning indicators relying on multi-source data and automated systems. Current research shortcomings are discussed, and suggestions for future improvements are proposed. This research can provide public officials with knowledge of flash flood early warnings, influencing policy and protecting people from flash flood disasters. [ABSTRACT FROM AUTHOR]