Shantytown renovation is a livelihood project initiated by the Chinese government to reconstruct urban dilapidated housing and improve housing conditions for families in need. Since the funding problem is a major obst...Shantytown renovation is a livelihood project initiated by the Chinese government to reconstruct urban dilapidated housing and improve housing conditions for families in need. Since the funding problem is a major obstacle in the course of shantytown renovation, the government actively advocates the adoption of the public-private partnership(PPP) model. In view of the particularity of shantytown renovation and the complexity of the PPP model operation procedures, it is considered that the risk management of shantytown renovation based on the PPP model. This paper identified and judged the main risks of the PPP project in shantytown renovation, and put forward corresponding suggestions for the risk management of the PPP project in shantytown renovation, hoping to provide a reference for government decision-making.展开更多
Based on the analysis of hanging rivers' actuality in the lower Yellow River and researches related to the evaluation of dike breach risks,it is put forward that the influencing factors of dike beach risks in the ...Based on the analysis of hanging rivers' actuality in the lower Yellow River and researches related to the evaluation of dike breach risks,it is put forward that the influencing factors of dike beach risks in the lower Yellow River should involve four aspects,the flow and sediment movement,the regional crustal stability,the variation of river regime and the stability of river dikes.With this,the evaluation indexes system of dike breach risks is established,and with the support of geographic information systems technology,the model of multi-hierarchical fuzzy comprehensive judgment is applied to estimate the dike beach risks of the hanging rivers in the lower Yellow River under different flood conditions.The evaluation results of dike breach risks show the following distributing regularities of dike breach risks in the lower Yellow River:(1) Dike breach risks increase with the increase of the flood.(2) Dike breach risks decrease with the changes of river patterns along the channel.(3) There are great risks of dike breach in the wandering reaches,and it is relatively higher in the south bank than in the north in wandering reaches.(4) There is a higher dike breach risk in the north bank than in the south in winding reaches.Simultaneously,the evaluation results manifest that the evaluation indexes system established from the flow and sediment movement,the regional crustal stability,the variation of river regime and the stability of river dikes can represent the actual situation of the lower Yellow River more comprehensively.The application of multihierarchical fuzzy comprehensive judgment can preferably resolve the problem of hanging river dike breach,which has numerous influencing factors and complicated functionary mechanisms.The applications of geographic information systems technology with powerful spatial analysis functions make dike beach risks quantificationally displayed in different spatial positions,and reflect the differences of dike beach risks in different spatial positions of the channel in the lower Yellow River.展开更多
文摘Shantytown renovation is a livelihood project initiated by the Chinese government to reconstruct urban dilapidated housing and improve housing conditions for families in need. Since the funding problem is a major obstacle in the course of shantytown renovation, the government actively advocates the adoption of the public-private partnership(PPP) model. In view of the particularity of shantytown renovation and the complexity of the PPP model operation procedures, it is considered that the risk management of shantytown renovation based on the PPP model. This paper identified and judged the main risks of the PPP project in shantytown renovation, and put forward corresponding suggestions for the risk management of the PPP project in shantytown renovation, hoping to provide a reference for government decision-making.
基金The State Science Research Plan (Grant no.96-920-09-01)
文摘Based on the analysis of hanging rivers' actuality in the lower Yellow River and researches related to the evaluation of dike breach risks,it is put forward that the influencing factors of dike beach risks in the lower Yellow River should involve four aspects,the flow and sediment movement,the regional crustal stability,the variation of river regime and the stability of river dikes.With this,the evaluation indexes system of dike breach risks is established,and with the support of geographic information systems technology,the model of multi-hierarchical fuzzy comprehensive judgment is applied to estimate the dike beach risks of the hanging rivers in the lower Yellow River under different flood conditions.The evaluation results of dike breach risks show the following distributing regularities of dike breach risks in the lower Yellow River:(1) Dike breach risks increase with the increase of the flood.(2) Dike breach risks decrease with the changes of river patterns along the channel.(3) There are great risks of dike breach in the wandering reaches,and it is relatively higher in the south bank than in the north in wandering reaches.(4) There is a higher dike breach risk in the north bank than in the south in winding reaches.Simultaneously,the evaluation results manifest that the evaluation indexes system established from the flow and sediment movement,the regional crustal stability,the variation of river regime and the stability of river dikes can represent the actual situation of the lower Yellow River more comprehensively.The application of multihierarchical fuzzy comprehensive judgment can preferably resolve the problem of hanging river dike breach,which has numerous influencing factors and complicated functionary mechanisms.The applications of geographic information systems technology with powerful spatial analysis functions make dike beach risks quantificationally displayed in different spatial positions,and reflect the differences of dike beach risks in different spatial positions of the channel in the lower Yellow River.
