气候变化及人类活动背景下石羊河流域生态与水资源变化特征OA北大核心CSTPCD

This study investigated the characteristics of climate factors and ecological environment changes in the Shiyang River Basin and discusses the impact of climate change and human activities on the ecological environ-ment of the basin based on meteorological data,remote sensing data,and human data of the Shiyang River Basin.Results demonstrated that the air temperature of the Shiyang River Basin significantly increased in the past 60 years,with a warming rate of 0.40℃·(10a)-1.The abrupt change occurred in 1998,and the significance test of 0.05 level was passed.Annual precipitation exhibited an increasing trend,with an increase of 7.3 mm·(10a)-1,and the difference between years was large.From the perspective of spatial distribution,annual precipitation de-creased from the south to the north of the basin.Dryness index revealed a decreasing trend since 1961 from the northern basin to the southern decline.The runoff of Jiutiaoling station at the exit of Xiying River in the upper reaches of the basin exhibited a weak upward trend,with an increase rate of 0.037×108 m3·(10a)-1,which was pri-marily affected by precipitation.Since the implementation of the 2007 Shiyang River Basin Management Plan,there have been significant changes in water resources and vegetation areas in this basin,the water discharge of Caiqi section,the average annual flow of the Shiyang River,and the area of the Qingtu Lake and its surrounding waters,wherein the vegetation increased significantly,and the groundwater level increased steadily.Under the du-al influence of climate change and human activities,the ecological environment of the Shiyang River Basin has been effectively improved,which provides a scientific basis for the protection and construction of ecological envi-ronment and the rational utilization and protection of water and soil resources.