退化绿洲生态恢复的政策保障研究——以甘肃省民勤县为例

民勤绿洲位于河西走廊三大内陆河流域之一的石羊河流域的下游,北、东、西三面受腾格里沙漠和巴丹吉林沙漠围绕。由于地下水位下降,气候干燥,水质变坏,使得本来就很脆弱的生态环境持续不断恶化,天然植被大面积枯萎死亡,地表水补给严重不足,荒漠化程度加剧。民勤绿洲无灌不植的现实使得＂人退沙退＂的生态恢复思路显然不适合这个地区,而这也...

Policy guarantee for ecological restoration of degenerated oasis——A case of Minqin County,Gausu Province,China

Minqin Oasis is located in the downstream of Shiyang River Basin-one of the three inner land rivers in Hexi Corridor,China.It is surrounded by Tengger desert and Badan Jara Desert from north,east and west sides.The fragile eco-environment has been degenerating continuously due to decline of underground water level,arid climate and deterioration of water quality,such as death of large area natural vegetation,serious shortage of underground water recharge,intensifying desertification.One of thought about ecological rehabilitation is "man retreat and sands will retreat",which is not suitable for Minqin Oasis on account of the reality that the plant would not survive unless irrigation.Thus,Minqin county government and Lanzhou University jointly proposed a new thought of ecological rehabilitation-"man settle and sands will settle".The focus of the problem shifts from "population migration" to "labor transformation",that is to say,the identity of laborer and the function of water,sands and land will be transformed from agricultural production to ecological rehabilitation,which need proper policy support.But the exclusive environmental,economic or social policy cannot ensure the implementation of the new ecological rehabilitation thought in isolation,so the various policy resources need to be integrated.Based on the actual dilemma of ecological rehabilitation in Minqin Oasis,we try to put forward a theoretical framework and our ideas of integration.