Abstract
The Biliu River is the largest river in Dalian. The occurrence of floods and droughts in this basin has extremely important impacts on local industry, agriculture, and urban development. For a long time, the annual distribution of precipitation in the Biliu River Basin is extremely uneven, the river runoff varies greatly from year to year and season to year, floods and droughts occur frequently, and serious soil erosion results in fragile ecological environment and severe shortage of water resources. In this paper, the spatial and temporal changes of rainfall and runoff in the Biliu River Basin are studied through the coupling of the MIKE 11 model and the MIKE SHE model. The hydrological changes in the Biliu River Basin are simulated. The coupled model is verified by monthly runoff data from 1996 to 2015, and the simulation values are found to be true. The values match well. Based on the cyclical pattern of precipitation and runoff in the Biliu River Basin, the rainfall and runoff data in the Biliu River Basin from 2016 to 2030 are derived. The MIKE SHE/MIKE 11 coupling model is used to predict the Biliu River from 2016 to 2030. The results show that flood disasters are expected to occur in August 2020, July 2025, and July 2030, which can provide a basis for hydrological management in the Biliu River Basin.
Highlights
Introduction e Biliu River is the largest river in the south of Liaoning Province. e basin runs through Yingkou and Dalian. e flood and drought conditions in the basin directly affect the industrial and agricultural development and economic growth of the people in the two places. e Cocoon Hydrological Station is located in Taudaoling Village, Guiyunhua Township, Zhuanghe City, Liaoning Province
In terms of professional software, the Danish Institute of Water Resources and Water Environment has been a world leader [8]. e company’s software has been verified in actual engineering and has been widely recognized in water resources research. e functions of the software cover production, sink, and flow, including land, rivers, lakes, and oceans. e spatial scope ranges from one dimension to three dimensions. e research area ranges from water environment to hydrodynamics, and the research business ranges from water resource assessment and management to surface water and groundwater [9, 10]
One-dimensional river networks, two-dimensional estuaries, and three-dimensional deep seas are involved. e Danish Institute of Water Resources and Water Environment is a professional research department dedicated to water resources and the water environment [11]. eir technology has always been a leader in the world [12]
Summary
According to the actual conditions of the Biliu River Basin, the channel conditions in the simulated section, and the ultimate goal of the study, several modules such as river runoff (OC), slope flow (OL), and unsaturated flow (UZ) were selected in the MIKE 11 model. Most of the Biliu River Basin is a rural area, and the land use has not changed much between 1978 and 2016, and it is relatively stable. All areas are gradually decreasing from the northeast to the southwest. e areas with increased rainfall are located in Dongsandaogou and Taipingzhuang in the northeast. e rainfall is greater than 560 mm, while the areas with lower rainfall are located in Bangladesh, in which the rainfall is less than 500 mm
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