فهرس المقالات debris flow

• حرية الوصول المقاله
  • صفحة الملخص
  • نص كامل
  
  1 - A new conceptual model for social-ecological environment capacity of debris flow waste-shoal land based on sustainable development in mountainous area
  Peng Zhao Daojie Wang Yong Li Yingchao Fang Huijuan Lan Wenle Chen Zengli Pei Yuchao Qi
  10.30495/jonass.2021.680194
  Background and objectives: Debris flow waste-shoal land (DFWSL) is a unique land resource with significant use prospects and development value (e.g. agriculture, urbanization, and infrastructure land). However, a lack of understanding of environment capacity hinders the أکثر

  Background and objectives: Debris flow waste-shoal land (DFWSL) is a unique land resource with significant use prospects and development value (e.g. agriculture, urbanization, and infrastructure land). However, a lack of understanding of environment capacity hinders the development and use of such land.Materials and methods: Therefore, this study examines DFWSL and relevant human and natural factors and proposes the concept of the social-ecological environment capacity (SEEC) of DFWSL. We explain the connotation by exploring the evaluation index system based on various theories, such as the dissipation structure theory, ecological disaster and change theory, ecosystem balance theory, ecosystem functional value assessment theory, land cover/land change, and related knowledge.Results and conclusion: Moreover, we form the framework for and research approaches to the SEEC of DFWSL. In this method, the number of active agents and the activity intensity are considered to evaluate the SEEC of the DFWSL system, and the distribution characteristics of active agents with dynamic states in different spatial and temporal scales are used to characterize the heterogeneity within the DFWSL system. We attempt to provide theoretical guidance for improving land use efficiency in mountainous areas relevant to maintaining ecological security and sustainable economic development. تفاصيل المقالة
• حرية الوصول المقاله
  • صفحة الملخص
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  2 - Experimental Study of the Effect of Hydraulic Parameters on Debris Flow Control in Inclined Slit Trapezoidal Check Dams
  Arash Razmkhah Mohammad reza Pirestani Amir Ebrahimi Fardshad
  Check dams are one of the structures used to control debris flows. In this study, in order to evaluate the effect of hydraulic parameters on debris sediment trapping rate by the slit trapezoidal check dams with different angles, and to develop an empirical relation for أکثر

  Check dams are one of the structures used to control debris flows. In this study, in order to evaluate the effect of hydraulic parameters on debris sediment trapping rate by the slit trapezoidal check dams with different angles, and to develop an empirical relation for determination of trapping coefficient of the dam reservoirs, three physical models of the check dams were used. The tests were performed on a shapeable flume with 15, 20 and 25 ° slopes, under 20, 25 and 30 liters per minute flow rates, 60, 75 and 90 degrees of check dam angles to the horizontal and for a sediment aggregate with a non-uniform gradation. By determination of the effective dimensionless parameters, the effect of these parameters on debris sediment trapping rate was evaluated by plotting diagrams. The analysis of experiments showed that, the trapping rate of the check dam increased by decreasing the channel slope, increasing the check dam spillway height and decreasing the check dam angle. Different relations were evaluated using linear and non-linear multivariate correlation analyses of dimensionless parameters, and a multivariate relation for determination of the sediment trapping coefficient was proposed. تفاصيل المقالة