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

doi:10.13866/j.azr.2024.10.06

Abstract

Abstract:

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 environment 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 decreased 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 primarily 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 dual 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 environment and the rational utilization and protection of water and soil resources.

Key words: climate change, human activities, ecological environment, water resources, Shiyang River Basin

CHENG Qian, QI Yue, LIU Mingchun, ZHANG Peng, DING Wenkui, LI Xingyu, REN Liwen, YANG Hua. Characteristics of ecology and water resource changes in the Shiyang River Basin under the background of climate change and human activities[J].Arid Zone Research, 2024, 41(10): 1672-1684.

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References 41

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	1月	2月	3月	4月	5月	6月	7月	8月	9月	10月	11月	12月	年
降水	0.181	1.141	-0.065	-0.092	0.116	0.337	0.492	0.525	0.411	0.492	0.328	-0.039	0.517
气温	0.189	0.174	0.501	0.451	0.212	-0.109	-0.197	-0.016	0.098	0.107	0.077	0.062	-0.102
气温、降水	0.302	0.214	0.503	0.453	0.269	0.342	0.500	0.532	0.441	0.494	0.359	0.067	0.537

要素		永昌	民勤	凉州	古浪	天祝	流域
NDVI	气温	0.306	0.194	0.356	0.277	0.191	0.427^**
	降水	0.490^**	0.190	0.363	0.465^**	0.695^*	0.508^**
	干燥度	-0.341	-0.094	-0.377	-0.487^*	-0.499^*	-0.295

Characteristics of ecology and water resource changes in the Shiyang River Basin under the background of climate change and human activities

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