基于实测数据的库姆塔格沙漠南北两侧洪积扇降水特征分析

doi:10.13866/j.azr.2021.01.16

Abstract

Abstract:

This study analyzed the precipitation characteristics in detail using the field precipitation data from June 2017 to May 2018 in alluvial fan in the north and south of Kumtag Desert. The results are as follows: (1) Due to the effect of geographical location, topography, etc. , the spatial distributions of precipitation in Kumtag Desert vary greatly. The minimum annual precipitation in Sanlongsha, Beishan alluvial fan in the north of Kumtag Desert, is 21. 6 mm. The precipitation in Altun alluvial fan in the south of Kumtag Desert gradually increases from west to east, and the annual precipitation in upper reach of Huyang, Wushikate, Saimagou, and Duobagou ditches is 73.0、75.2、176.0 mm, and 137.4 mm, respectively. The precipitation in Altun alluvial fan in the south of Kumtag Desert gradually increases from the north to south and the annual precipitation in lower and middle reaches of Huyang ditch is 58.0 and 56.4 mm, respectively, which is lower than that in upper reach of Huyang ditch. (2) The precipitation in alluvial fan in the north and south of Kumtag Desert mainly occurs from May to August and the cumulative precipitation can account for more than 90% of full year. (3) The number of precipitation events in alluvial fan in the north and south of Kumtag Desert lies between 11 and 26, and a small number of large precipitation events contributes immensely to the total annual precipitation.

Key words: Kumtag Desert, precipitation, alluvial fan

PANG Yingjun,WU Bo,KONG Deyong,GAO Junliang. Precipitation characteristics in alluvial fan in the north and south of Kumtag Desert based on measured data[J].Arid Zone Research, 2021, 38(1): 144-153.

Figures/Tables 6

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References 32

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	降水事件次数	降水事件持续时间/min			降水事件累计降水量/mm			降水事件的降水强度/（mm·h^-1）
	降水事件次数	最小值	最大值	平均值	最小值	最大值	平均值	最小值	最大值	平均值
三垄沙	11	10	470	148	0.2	8.8	1.96	0.18	6.80	1.49
胡杨沟上游	22	10	1560	218	0.2	22.4	3.32	0.13	5.04	1.37
胡扬沟中游	18	10	1580	278	0.2	22.8	3.13	0.16	2.49	0.93
胡扬沟下游	18	10	1450	221	0.2	22.8	3.22	0.08	5.60	1.35
乌什喀特	23	10	1550	221	0.2	26.4	3.40	0.38	9.60	1.58
赛马沟	18	10	1740	463	0.2	42.6	9.78	0.31	5.59	1.53
多坝沟	26	10	1770	352	0.2	30.6	6.15	0.17	4.80	1.41

Precipitation characteristics in alluvial fan in the north and south of Kumtag Desert based on measured data

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