元谋干热河谷区近60年干湿状况和气温变化特征分析

doi:10.3969/j.issn.1674-8530.16.0284

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Abstract In order to study the characteristics of the dry-hot conditions in recent 60 years in Yuanmou dry-hot valleys(DHV)area, this paper selects the micro-meteorological data collected from the Yuanmou Meteorological Station to calculate the reference crop evapotranspiration and relative moisture index. Trend and mutation were calculated and analyzed by linear propensity estimation me-thod, Mann-Kendall method and sliding t-test method. The results showed that the average humidity was increasing in the annual and seasonal scale, seasonal average humidity size is summer> autumn> winter> spring. Climate tendency rate size is winter(1.99%/10 a)>spring(1.43%/10 a)>autumn(1.21%/10 a)> summer(0.93%/10 a). The seasonal average temperature and the minimum temperature showed a trend of decline, summer> spring> autumn> winter. Climatic tendency rate in the following order: spring> winter.>summer> autumn. The maximum temperature in summer was the highest and the trend was decreasing. On the annual and other seasonal scales showed a trend of decline. The biggest temperature increased in spring. Yuanmou dry-hot valleys(DHV)area towards the direction of the development of wet and cooling, the drought situation has eased. The drought situation is still grim, spring and summer is the key stage of drought resistance.

Key words： Yuanmou dry-hot valley(DHV) relative humidity index temperature climatic tendency Mann-Kendall method

Received: 15 November 2016

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	LIU Yan-Wei
	WANG Shu-Ying-^*
	TU Xing-Lei
	YANG Qi-Liang

Cite this article:

LIU Yan-Wei,WANG Shu-Ying-^*,TU Xing-Lei等. Characteristic analysis of dry-wet condition and temperature trend in Yuanmou dry-hot valley(DHV)in resent 60 years[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(2): 172-178.

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http://zzs.ujs.edu.cn/pgjx/EN/10.3969/j.issn.1674-8530.16.0284 OR http://zzs.ujs.edu.cn/pgjx/EN/Y2018/V36/I2/172

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