Based on the analysis of current situation of water environment in the Chaohu Lake,general ideas and measures of controlling the water environment were proposed. In respect of control ideas,controlling outbreaks of bl...Based on the analysis of current situation of water environment in the Chaohu Lake,general ideas and measures of controlling the water environment were proposed. In respect of control ideas,controlling outbreaks of blue-green algae should be as one of control goals; it is needed to combine reducing the quantity of blue-green algae with decreasing eutrophication level to make the decrease in the quantity of blue-green algae larger than their natural increase until outbreaks of blue-green algae are eliminated; all kinds of techniques should be combined closely,integrated and innovated,and corresponding safeguard measures should be adopted. In respect of control measures,controlling sources of pollution and intercepting pollutants are basic measures,of which improving sewage treatment capacity and standard greatly is a key measure,and actively controlling pollution from large-scale livestock and poultry breeding is one of main measures; rivers polluted heavily should be controlled,and using microorganisms to purify small and moderate rivers can be as one of preferred techniques; blue-green algae should be dredged deeply to reducing their quantity; water should be transferred from the Yangtze River to the Chaohu Lake or the Hauihe River to purify water bodies and increase environmental capacity; reed wetland should be restored on a large scale to increase vegetation coverage from 5% to 20%; dredging should be combined with the elevation of basement of restored reed wetland.展开更多
Based on analysis of current situation of national marine ecological civilization demonstration areas in China, problems were discussed from aspects of shoreline development, marine disaster waming, marine pollution, ...Based on analysis of current situation of national marine ecological civilization demonstration areas in China, problems were discussed from aspects of shoreline development, marine disaster waming, marine pollution, etc. Afterwards, some development strategies were proposed to provide references for construction of marine ecological civilization demonstration areas in China, thereby promoting overall construction of marine ecological civilization in China.展开更多
This paper is aimed to analyze the current situation and problems about land use of various karst environments via field survey,documentation and comparison methods,and to make reasonable recommendations about land us...This paper is aimed to analyze the current situation and problems about land use of various karst environments via field survey,documentation and comparison methods,and to make reasonable recommendations about land use and management for different karst types in a bid to provide theoretical and practical basis for optimization of karst land use and the comprehensive control of karst rock desertification.The results show that,①as the bare karst areas are lack of water and soil and highly vulnerable to droughts and floods,land utilization in such areas should follow the principles of soil and water conservation and ecological restoration,emphasize both the ecological benefit and the economic benefits and reasonably configure the land resources to achieve virtuous circle;②in covered karst areas,the most important task is to take measures to prevent the appearance of secondary karst rock desertification,water exhaustion and karst collapse;③the buried karst areas shall mainly focus on prevention of overlaying sand shale collapse,and possible pollution of deep karst water and the surface land resulted from exploration and exploitation of oil and gas and geothermal water.④The final conclusion is that features and problems of land utilization of the three karst types are different from each other,and that the general principle for land use in karst regions shall be based on the local conditions.展开更多
文摘Based on the analysis of current situation of water environment in the Chaohu Lake,general ideas and measures of controlling the water environment were proposed. In respect of control ideas,controlling outbreaks of blue-green algae should be as one of control goals; it is needed to combine reducing the quantity of blue-green algae with decreasing eutrophication level to make the decrease in the quantity of blue-green algae larger than their natural increase until outbreaks of blue-green algae are eliminated; all kinds of techniques should be combined closely,integrated and innovated,and corresponding safeguard measures should be adopted. In respect of control measures,controlling sources of pollution and intercepting pollutants are basic measures,of which improving sewage treatment capacity and standard greatly is a key measure,and actively controlling pollution from large-scale livestock and poultry breeding is one of main measures; rivers polluted heavily should be controlled,and using microorganisms to purify small and moderate rivers can be as one of preferred techniques; blue-green algae should be dredged deeply to reducing their quantity; water should be transferred from the Yangtze River to the Chaohu Lake or the Hauihe River to purify water bodies and increase environmental capacity; reed wetland should be restored on a large scale to increase vegetation coverage from 5% to 20%; dredging should be combined with the elevation of basement of restored reed wetland.
文摘Based on analysis of current situation of national marine ecological civilization demonstration areas in China, problems were discussed from aspects of shoreline development, marine disaster waming, marine pollution, etc. Afterwards, some development strategies were proposed to provide references for construction of marine ecological civilization demonstration areas in China, thereby promoting overall construction of marine ecological civilization in China.
基金Supported by the Fundamental Research Funds for the Central Universities(XDJK2011C048)
文摘This paper is aimed to analyze the current situation and problems about land use of various karst environments via field survey,documentation and comparison methods,and to make reasonable recommendations about land use and management for different karst types in a bid to provide theoretical and practical basis for optimization of karst land use and the comprehensive control of karst rock desertification.The results show that,①as the bare karst areas are lack of water and soil and highly vulnerable to droughts and floods,land utilization in such areas should follow the principles of soil and water conservation and ecological restoration,emphasize both the ecological benefit and the economic benefits and reasonably configure the land resources to achieve virtuous circle;②in covered karst areas,the most important task is to take measures to prevent the appearance of secondary karst rock desertification,water exhaustion and karst collapse;③the buried karst areas shall mainly focus on prevention of overlaying sand shale collapse,and possible pollution of deep karst water and the surface land resulted from exploration and exploitation of oil and gas and geothermal water.④The final conclusion is that features and problems of land utilization of the three karst types are different from each other,and that the general principle for land use in karst regions shall be based on the local conditions.
