Changjiang County is located to the northwest of the tailing range of the Wuzhi Mountains on Hainan Island, facing the sea and being against the Mountains. From southeast to northwest, it gradually descends in relief ...Changjiang County is located to the northwest of the tailing range of the Wuzhi Mountains on Hainan Island, facing the sea and being against the Mountains. From southeast to northwest, it gradually descends in relief from mountain, hill, tableland, terrace to coastal plain. Its sandy coastal line is measured at 44.85 km in length and its rocky coastal line at 7.15 km along the county. The desertified coastal land covers an area of about 61.15 km2, ex tending from hundreds of meters to 3 km in width, of which the active sand land accounts for 5. 333 km2 and the semi-active sand land, 7. 333 km2. The dunes are developed at the rate of 10 - 30 m per year from the seashore toward the hinterland.The Forest Departments of Hainan Province and Changjiang County have done a series of sand-control experiments. The chief technological measures are as follows: (1) to stabilize the drift sand first to create an adequate condition for afforestation; (2) to plant the big and strong saplings of Casuarin equisetifolia with nutrient bags in deep pits; and (3) to apply new tech niques in 'dry-season planting' to guarantee the quality of afforestation. The above experi ments were successful. However, there still exist some problems such as quite seriously wilting shoot, lower survival rate of Pandanus tectorius in the vertical lines to the usual wind direc tion, monotonous tree species in afforestation and subsequent poor management. Thus some suggestions are offered in this paper for future extension: ( 1 ) to apply REE fertilizers in the process of afforestation to increase the resistance of the plants; (2) to increase the vertical lines of Pandanus tectorius to the usual wind direction to raise their survival rate in the network of sand stabilization; (3) to enlarge the area of liana planting to enhance the stability of sand; (4)to try to introduce new tree species from other regions, which are of good performance in sand stabilization; (5) to interplant the adaptable economic crops; and (6) to make more invest ments and better management and conduct more extensive environmental education to ensure the early accomplishment of the protection forest belt around the island.展开更多
Chinese government has adopted a series of management measures to prevent and manage marine pollution and to protect ocean bio resources and ecosystem. The key points of Chinese marine environmental quality status, po...Chinese government has adopted a series of management measures to prevent and manage marine pollution and to protect ocean bio resources and ecosystem. The key points of Chinese marine environmental quality status, pollution monitoring and environmental management since 1980' were discussed in this paper. Those included the investigations of Chinese coast environmental quality, monitoring techniques and standards, as well as the marine environmental management measures. Recent status of marine environmental pollution and the monitoring network in China were also introduced.展开更多
在亚洲地区,不同流域的海岸带所接受的淡水、沉积物、营养物质和污染物质入海通量有着很大的差异。入海通量的特征受到流域人类活动的强烈影响,如水坝建设和化肥的大量施用。气候和海平面的变化也起了一定的作用。流域—海岸相互作用的...在亚洲地区,不同流域的海岸带所接受的淡水、沉积物、营养物质和污染物质入海通量有着很大的差异。入海通量的特征受到流域人类活动的强烈影响,如水坝建设和化肥的大量施用。气候和海平面的变化也起了一定的作用。流域—海岸相互作用的特点是,入海物质通量的变化将导致流域、河口以及邻近水域的地貌、环境和生态系统的改变。在流域—海岸系统不断变化的情况下,为了改进流域—海岸系统开发的管理策略,应进行以下调查和研究工作:①在现场监测和观察的基础上,定量地描述上述变化;②了解引起上述变化的过程和机制;③发展预测未来变化的趋势和幅度的新方法、新技术;④将所获结果应用于流域—海岸系统的开发和管理实践。为了确定本研究领域今后10年的资助方向,APN(Asian Pacific Network for G lobal Change Research)召集了相关的学术研讨会。按照APN的部署,笔者负责完成了“流域—海岸相互作用”领域的研究课题建议,本文是这份文件的简要总结。展开更多
基金国家自然科学基金，Hainan Natural Science Foundation，Hainan Provincial Bureau of Education
文摘Changjiang County is located to the northwest of the tailing range of the Wuzhi Mountains on Hainan Island, facing the sea and being against the Mountains. From southeast to northwest, it gradually descends in relief from mountain, hill, tableland, terrace to coastal plain. Its sandy coastal line is measured at 44.85 km in length and its rocky coastal line at 7.15 km along the county. The desertified coastal land covers an area of about 61.15 km2, ex tending from hundreds of meters to 3 km in width, of which the active sand land accounts for 5. 333 km2 and the semi-active sand land, 7. 333 km2. The dunes are developed at the rate of 10 - 30 m per year from the seashore toward the hinterland.The Forest Departments of Hainan Province and Changjiang County have done a series of sand-control experiments. The chief technological measures are as follows: (1) to stabilize the drift sand first to create an adequate condition for afforestation; (2) to plant the big and strong saplings of Casuarin equisetifolia with nutrient bags in deep pits; and (3) to apply new tech niques in 'dry-season planting' to guarantee the quality of afforestation. The above experi ments were successful. However, there still exist some problems such as quite seriously wilting shoot, lower survival rate of Pandanus tectorius in the vertical lines to the usual wind direc tion, monotonous tree species in afforestation and subsequent poor management. Thus some suggestions are offered in this paper for future extension: ( 1 ) to apply REE fertilizers in the process of afforestation to increase the resistance of the plants; (2) to increase the vertical lines of Pandanus tectorius to the usual wind direction to raise their survival rate in the network of sand stabilization; (3) to enlarge the area of liana planting to enhance the stability of sand; (4)to try to introduce new tree species from other regions, which are of good performance in sand stabilization; (5) to interplant the adaptable economic crops; and (6) to make more invest ments and better management and conduct more extensive environmental education to ensure the early accomplishment of the protection forest belt around the island.
文摘Chinese government has adopted a series of management measures to prevent and manage marine pollution and to protect ocean bio resources and ecosystem. The key points of Chinese marine environmental quality status, pollution monitoring and environmental management since 1980' were discussed in this paper. Those included the investigations of Chinese coast environmental quality, monitoring techniques and standards, as well as the marine environmental management measures. Recent status of marine environmental pollution and the monitoring network in China were also introduced.
文摘在亚洲地区,不同流域的海岸带所接受的淡水、沉积物、营养物质和污染物质入海通量有着很大的差异。入海通量的特征受到流域人类活动的强烈影响,如水坝建设和化肥的大量施用。气候和海平面的变化也起了一定的作用。流域—海岸相互作用的特点是,入海物质通量的变化将导致流域、河口以及邻近水域的地貌、环境和生态系统的改变。在流域—海岸系统不断变化的情况下,为了改进流域—海岸系统开发的管理策略,应进行以下调查和研究工作:①在现场监测和观察的基础上,定量地描述上述变化;②了解引起上述变化的过程和机制;③发展预测未来变化的趋势和幅度的新方法、新技术;④将所获结果应用于流域—海岸系统的开发和管理实践。为了确定本研究领域今后10年的资助方向,APN(Asian Pacific Network for G lobal Change Research)召集了相关的学术研讨会。按照APN的部署,笔者负责完成了“流域—海岸相互作用”领域的研究课题建议,本文是这份文件的简要总结。
