欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
入海径流量是流域水循环的重要分量,识别入海径流量演变过程及影响因素对流域生态安全及三角洲湿地安全有重要意义。以万泉河流域入海口主要水文站加积站1956-2007年水文和流域气象资料为基础,运用有序聚类等统计方法和GIS技术,研究流域入海径流量演变规律及其影响因素。结果表明,降雨量和径流量均呈下降趋势,径流量下降幅度更明显,径流系数系列2003年前后发生了突变。将1956-1976年作为基准期,利用降雨-径流关系,定量分析了人类活动对径流演变的影响,发现人类活动对下垫面改变是造成2003年后径流显著减小的重要原因。流域山区热带雨林替代为经济林,植被结构改变已导致流域涵养水源功能下降。禁止砍伐热带雨林,阻止种植经济林对维护岛屿生态安全尤为关键。
英文摘要：
The discharge into the sea is an important component of river basin water cycle,identifying the change process and influencing factors of discharge into the sea is of great significance for the basin and delta wetland ecological security safety.Based on the measured data of precipitation and hydrological data at Jiaji Station which is the main controlling station on the river.The characteristics of discharge into the sea and its influencing factors of Wanquan River Basin in the past 52years（1956-2007）have been analyzed by using cluster technique method,GIS technology and other statistical methods.The research shows that the precipitation and runoff series exhibited a declining tendency and the runoff decreases obviously.Runoff coefficient series shows a drop change point around 2003.A regression equation based on the data of precipitation and runoff in 1956-1976 is obtained.By using this equation the impact of human activities on runoff can be quantified.The calculated results show that the land cover change is the important cause of runoff decrease after 2003.Changes in vegetation structure resulting in water conservation ecological function decline because of the destruction of mountain rainforest and illegal-planted economic forests in the basin.Prohibit felling rainforests and preventing planting commercial forests are critical to the maintenance of the island＇s ecological security.
同期刊论文项目
同项目期刊论文
期刊信息
位置：