Long-runout rockslides at high altitude could cause disaster chain in river basins and destroy towns and major infrasturctures.This paper firstly explores the initiation mechanism of high-altitude and long-runout rock...Long-runout rockslides at high altitude could cause disaster chain in river basins and destroy towns and major infrasturctures.This paper firstly explores the initiation mechanism of high-altitude and long-runout rockslides.Two types of sliding-prone geostructure models,i.e.the fault control type in orogenic belt and the fold control type in platform area,are proposed.Then,large-scale experimental apparatus and associated numerical simulations are conducted to understanding the chain-style dynamics of rockslide-debris avalanche-debris flow.The results reveal the fragmentation effects,the rheological behaviors and the boundary layer effect of long-runout avalanche-debris flow.The dynamic character-istics of quasi-static-transition-inertia state and solid-liquid coupling in rapid movement of rockslide-debris avalanche-debris flow are investigated.Finally,the risk mitigation strategy of the non-structure and structure for resilient energy dissipation are illustrated for initiation,transition and deposition zones.The structural prevention and mitigation methods have been successfully applied to the high-altitude and long-runout rockslides in Zhouqu and Maoxian of the Wenchuan earthquake zone,as well as the other major geohazards in Qinghai-Tibet Plateau and its adjacent areas.展开更多
This paper gives a brief report of the pen closing prevention technique for the WSSV disease of penaeid shrimp . The key measure of the technique is to set a crab prevention pen to close the ponds. Besides shrimp grow...This paper gives a brief report of the pen closing prevention technique for the WSSV disease of penaeid shrimp . The key measure of the technique is to set a crab prevention pen to close the ponds. Besides shrimp growing ponds,it also needs water treating ponds. Water entering the ponds must be filtered through a 60 mesh screen. Shrimp fry to be stocked must be WSSV free . The ponds must be disinfected thoroughly to iliminate all the pathogenes and their vectors before fry stocking. In the whole culture period, water added to the ponds must also be disinfected. The prevention efficiency of the technique was 95%～100% in experiments, and 79%～100% in preliminary application in culture practice.展开更多
基金This work was financially supported by National Natural Science Foundation of China(Grant Nos.U2244226,U2244227 and 42177172).
文摘Long-runout rockslides at high altitude could cause disaster chain in river basins and destroy towns and major infrasturctures.This paper firstly explores the initiation mechanism of high-altitude and long-runout rockslides.Two types of sliding-prone geostructure models,i.e.the fault control type in orogenic belt and the fold control type in platform area,are proposed.Then,large-scale experimental apparatus and associated numerical simulations are conducted to understanding the chain-style dynamics of rockslide-debris avalanche-debris flow.The results reveal the fragmentation effects,the rheological behaviors and the boundary layer effect of long-runout avalanche-debris flow.The dynamic character-istics of quasi-static-transition-inertia state and solid-liquid coupling in rapid movement of rockslide-debris avalanche-debris flow are investigated.Finally,the risk mitigation strategy of the non-structure and structure for resilient energy dissipation are illustrated for initiation,transition and deposition zones.The structural prevention and mitigation methods have been successfully applied to the high-altitude and long-runout rockslides in Zhouqu and Maoxian of the Wenchuan earthquake zone,as well as the other major geohazards in Qinghai-Tibet Plateau and its adjacent areas.
文摘This paper gives a brief report of the pen closing prevention technique for the WSSV disease of penaeid shrimp . The key measure of the technique is to set a crab prevention pen to close the ponds. Besides shrimp growing ponds,it also needs water treating ponds. Water entering the ponds must be filtered through a 60 mesh screen. Shrimp fry to be stocked must be WSSV free . The ponds must be disinfected thoroughly to iliminate all the pathogenes and their vectors before fry stocking. In the whole culture period, water added to the ponds must also be disinfected. The prevention efficiency of the technique was 95%～100% in experiments, and 79%～100% in preliminary application in culture practice.
