Flood control and land use management in Mengwa retention area, Huai River Basin

Abstract

Retention areas have a very important role in flood alleviation in the Huai River Basin. With economic and societal development the former retention areas have been developed and some of them even became very important urban areas. When floods come, there is a lot of damage.The government has realized that the flood control standards in the whole river basin are low and has made a plan to increase flood control standards for the Mengwa retention area. The design water level will be 28.00 mþMSL at Runheji. In light of this the use of the Mengwa retention area needs to be considered. To arrive at decisions that reduce flood damage, one should take into account the following uncertainties: the river discharge, the flood damage given the discharge, the downstream water level given the discharge, and the costs of constructing embankments and dredging the river. By using the DUFLOW model and a GIS model, the present situation and the alternative development options have been analysed. How to use the Mengwa retention area is also discussed. Copyright

Overview of Prominent Problems in Huai River Basin, China

“…The total population is 170 million and total cultivated land is about 12 million hectare. 8,9 From seven river basins Huai river basin is the third largest river basin in population and the main agricultural product producing area of China. 10,11 The geographical coordinate location of Huai River Basin is 30°55'-36°36'N latitude, and 111°55'-121°25'E longitude, as one of the top seven river basins in China 8−12 ( Figure 1).…”

Optimal gate operation of a main drainage canal in a flat, low-lying, agricultural area using a tank model

“…Hsu et al (2000) simulated the inundation for urban drainage basin with a storm sewer system. Ruiguang and Suryadi (2004) applied DUFLOW and GIS models for flood control and land use management in the Mengwa Rentention area and the Huai River basin. Pappenberger et al (2005) used inundation and downstream water level observations to calibrate the effect of roughness parameters in HEC-RAS.…”

Evaluation of Rainfall Thresholds Through Entropy: Influence of Bivariate Distribution Selection

“…To build a resilient environment, it is necessary to increase awareness of the need for risk management, thereby reducing human and economic losses due to natural hazards (Ruiguang and Suryadi, ). Flood protection strategies aim to protect both rural and urban areas in flood‐prone zones (Schultz, ).…”