Subjects: Hydraulic Engineering >> River Silt Engineering submitted time 2021-09-01
Abstract： "
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Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-01-30
Abstract： From the perspective of systematic thinking, this study applied the theories of information entropy and dissipative structure to comprehensively evaluate and analyze the evolution of the complex system of the Yellow River Basin over the past 40 years. With the concept of “Basin Development Index (BDI shortly)”, a preliminary scientific comprehensive evaluation method system of basin development quality is established. Results of the model calculation show that the ratio of per capita GDP in the basin to the national average and the total sedimentation in the lower Yellow River have occupied the largest weight for many years, and have had a relatively greater impact on the development of the basin in different historical periods. During the entire 40 years, the value of BDI has varied from 50.5 points in 1996 to 66.6 points in 2019, and has generally experienced a decreasing and an increasing stage. The evolution of BDI of Yellow River basin is consistent with the overall law of the basin development and has a great correlation with some major events happened in the basin. In addition, this research method can be extended to other fields such as regional governance. Compared with the current evaluation models mainly based on economic indicators, this novel methodology is more systematic and scientific, and will better serve the decision-making with more scientific thoughts.
Peer Review Status:Awaiting Review
Subjects: Hydraulic Engineering >> Basic Disciplines of Hydraulic Engineering submitted time 2021-01-26
Abstract： The Yellow River is the mother river of Chinese nation. In recent years, the inflow and sediment of the Yellow River have decreased, with extreme climate events occurred frequently, the boundary conditions have changed greatly. As the rapid economic and social development, it is necessary to carry out river health diagnosis under the changing environment. This research adopted information entropy and entropy weight methods to study the evolution characteristics of the healthy development of the Yellow River basin. Results showed that: (1) The river system presented healthy in 1980~1986, unhealthy in 1987~1999 and sub-healthy in 2000~2019. (2) The river system showed a healthier trend within 1980~1984, an increasingly unhealthy trend in 1984~1996, while following a good development trend in 1996~2019. (3) The flood discharge capacity of the main channel of the Ningxia-Inner Mongolia reach and the total amount of erosion and deposition in the downstream are the most sensitive factors.
Peer Review Status:Awaiting Review
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