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中文摘要：
采用广东省东江流域过去50a的土地利用与水资源降雨径流等资料,研究流域内土地利用和覆被变化对水文系统的影响.结果表明：东江流域的归一化植被指数（NDVI）与天然径流、年蒸散发和径流系数等不存在显著相关性.近些年来东江流域径流量的增加主要是由于城市化及各类工程建设等剧烈人类活动导致的流域地表覆被变化所引起.流域水文系统变化的影响因素十分复杂,主要是气候变化和人类活动的共同作用.
英文摘要：
On the basis of hydrological data in the East River basin, South China during the past five decades, the impact of land use changes and vegetation cover changes on the hydrological system of the basin is analyzed in this study. It was found that the Normalized Difference Vegetation Index （NDVI） in the basin is not significantly correlated with natural runoff, annual evapotranspiration or runoff coefficient. Changes in the conditions of the underlying surface of the river basin arising from land use/land cover changes are the primary factor affecting runoff in the East River basin and are the main impact factor for the increase of runoff in the river basin. Changes in the hydrological system of the East River basin are subject to the impact of complex factors, typically the joint impact of climatic changes and human activities.
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