[1]强皓凡,靳晓言,赵璐,等.基于相对湿润度指数的近56年若尔盖湿地干湿变化[J].水土保持研究,2018,25(01):172-177,182.
　QIANG Haofan,JIN Xiaoyan,ZHAO Lu,et al.Dry-Wet Condition Variations in Zoige Wetland in Recent 56 Years Based on Relative Humidity Index[J].Research of Soil and Water Conservation,2018,25(01):172-177,182.
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基于相对湿润度指数的近56年若尔盖湿地干湿变化

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年01期 页码: 172-177,182 栏目: 出版日期: 2018-02-28
Title:
Dry-Wet Condition Variations in Zoige Wetland in Recent 56 Years Based on Relative Humidity Index
作者:
强皓凡1,2, 靳晓言1,2, 赵璐1,2, 卢泽华3
1. 四川大学 水力学与山区河流开发保护国家重点实验室 水利水电学院, 成都 610065;
2. 南方丘区节水农业研究四川省重点实验室, 成都 610066;
3. 四川省农田水利局, 成都 610000
Author(s):
QIANG Haofan1,2, JIN Xiaoyan1,2, ZHAO Lu1,2, LU Zehua3
1. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China;
2. Provincial Key Laboratory of Water-Saving Agriculture in Hilly Areas of South China, Chengdu 610066, China;
3. Farmland Water Conservancy of Sichuan Province, Chengdu 610000, China
关键词:
若尔盖湿地; 相对湿润度指数; Mann-Kendall法; 小波分析; 季节变化
Keywords:
Zoige Wetland; relative humidity index; Mann-Kendall method; wavelet analysis; season variations
分类号:
P462.2
摘要:
基于若尔盖湿地5个代表气象站1960—2015年逐日气象数据，计算相对湿润度指数（M），采用Mann-Kendall法、Morlet小波分析法，分析了湿地近56年年、季尺度干湿变化及气候要素变动特征，采用Pearson相关系数法研究该区域M变化成因，为湿地生态环境变化的研究提供参考依据。结果表明：（1）若尔盖湿地年M呈显著下降趋势（p < 0.05），其倾向率为-0.018/10 a，有干旱化发展趋势；冬、春两季干旱较为严重且近56年有趋湿倾向，夏、秋两季较为湿润但有趋干倾向，干旱程度依次为：冬 > 春 > 年 > 夏 > 秋。（2）秋季于1995年发生显著趋干突变（p < 0.05），其他时间尺度无明显突变；（3）年际M存在25~30 a，12~15 a，7~10 a三种尺度的周期变化，春、夏、秋、冬各季亦存在多种时间尺度的周期振荡，且未来中短期内冬季仍是干旱期。（4）降水量、相对湿度的减少和日照时数、潜在蒸散量的增加对湿地干旱化起主要作用，平均气温和风速的上升影响较小，其中降水量是最主要因子。
Abstract:
Based on the daily meteorological data from 5 stations in Zoige Wetland, the relative humidity index was calculated. Mann-Kendall method and Morlet wavelet analysis were used to analyze the changes of dry-wet conditions and meteorological elements in recent 56 years. The Pearson correlation coefficient method was used to study the cause of relative humidity index variations. The results showed that:(1) the annual relative humidity index of Zoige Wetland was significantly decreasing (p < 0.05) with the tendency of -0.018/decade, showing the significantly dry trend, it was relative arid in winter and spring with the trend towards humidification, while summer and autumn were humid relatively with the trend towards acidification in recent 56 years, the drought was most serious in winter, followed by spring, year, summer and autumn; (2) there was the significant abrupt point of autumn towards acidification in 1995 (p < 0.05) while no mutant phenomena were found in other time scales; (3) periodic oscillation with multiple times scales of annual and seasonal relative humidity index existed with the oscillation circulation of 25～30 years, 12～15 years and 7～10 years, and winter may still be dry in future short-term; (4) the decrease of precipitation and relative humidity, increase of sunshine duration and potential evapotranspiration played the major role in wetland drying tendency, while the effect of average temperature and wind speed increase was minor. Precipitation was the dominant factor on the dry-wet condition variations of wetland.

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备注/Memo

收稿日期:2017-4-8;改回日期:2017-4-24。
基金项目:国家科技支撑计划项目（2015BAD24B01）；西北典型农区高效节水灌溉技术与集成（2016YFC0400200）
作者简介:强皓凡(1996-),男,甘肃白银人,从事水文水资源与气象变化研究。E-mail:qianghaofan96@163.com
通讯作者:赵璐(1986-),女,四川南充人,博士,讲师,主要从事水文水资源方面的研究。E-mail:luya1121@163.com

更新日期/Last Update: 1900-01-01