Abstract
Abstract. In order to fully use the newly-built hydrologic stations in small and medium rivers for flood warning and prevention, based on the technical line of the investigation and evaluation of flash flood disasters, different historical flood information of the warning river section was investigated, while the elevations of riverain houses were measured. The relationship between the stations and affected population has been established for the study region. According to integrated flood control capability of riverside residents, the characteristic water levers and rainfall threshold values were determined in this case. The results indicate that the warning and safety levels are 54.0 and 55.3 m, respectively. The analysis results show that the warning should be issued when the net rainfall intensity is 70 mm h−1 or 110 mm for 6 h condition. And considering the effectiveness of disaster avoidance, variable characteristic water levers of the hydrologic station for flood warning in different village were determined on the basis of the flood control capability of each village. The relationship between hydrologic numerical value and inundating influence was established in a one-to-n way.
Highlights
Since the Construction of small and medium-sized rivers hydrology monitoring system, density of hydrological monitoring sites was improved
In order to accurately and effectively reflect the correlation between hydrological factors and urban flood control ability, hydrology bureau of Anhui province organized and carried out an urban mountain flood impact survey in shitai county according to the above technical route (Hu, 2015)
In order to meet the needs of analysis of flood warning characteristic water level of shitai, flow test is carried out in 2017.There is no cable facilities at this station, the bridge is used as a river crossing equipment
Summary
Since the Construction of small and medium-sized rivers hydrology monitoring system, density of hydrological monitoring sites was improved . The paper takes the new hydrological station in the central district of Shitai county in the southern Anhui province as an example with technical route which called “The research and application of investigation and evaluation on mountain torrent disaster as well as early warning key technology” (Hu et al, 2016), through the survey of historical flood and elevation of the houses along the banks of the river (MWR, 2015) It evaluates the flood protection capacity of the early warning object and establishes the link between hydrologic and social economic factors, to determine the rainfall warning threshold and characteristics of water level
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
