1990—2013年湖南四水入洞庭湖汛期径流量的变化规律
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TV121+.4

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教育部2012年高等学校博士学科点专项科研基金(20124306110009);湖南省重点学科建设项目(2011-001);湖南省自然科学基金重点项目(12JJ2026)


Variation law of runoff in flood seasons into Dongting Lake from Four Rivers in Hunan Province during 1990—2013
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    摘要:

    根据湖南四水(湘江、资水、沅江、澧水)主要代表水文站1990—2013年汛期月径流量实测数据,应用滑动平均法、小波分析法和Mann-Kendall非参数趋势检验法、分配不均匀系数和变化幅度等方法和指标,分析四水流域汛期径流量的年际和年内变化规律,对汛期内分配指标与湖南省水旱灾害状况进行了灰色关联度分析。结果表明:(1)湖南四水入洞庭湖汛期径流量年际分配极不均匀,入湖汛期径流量呈现逐渐减少的趋势。(2)湘潭站和桃江站的第一主周期均为6 a,桃源站和石门站的第一主周期均为4 a。(3)桃江站和桃源站分别于2003年和2004年发生了突变,湘潭站和石门站均未发生过突变。(4)四水入湖径流量在汛期内各月之间分配极不均匀,但随时间的推移,逐渐趋向均匀;汛期内各月径流量呈现波动递减的趋势;4站各项分配指标值总体上呈现下降的趋势。(5)四水入湖径流量汛期内分配特征指标与流域水旱灾害的灰色关联度极高,并在一定程度上反应流域汛期水旱灾害情况。

    Abstract:

    According to the data of runoff of the Four Rivers(Xiangjiang River, Zishui River, Yuanjiang River, Lishui River)measured by main hydrological station during 1990—2013, we analyze the annual variation law of runoff in flood season of the Four River and conduct a gray correlation degree analysis over the distribution of indicators in the flood season and floods and droughts situation in Hunan Province with the methods of moving average, wavelet analysis, Mann-Kendall mutation test, non-uniformity coefficient and amplitude of variation, etc. The results indicate that: (1)the distribution of inter-annual flood season’s runoff into Dongting Lake from the Four Rivers was quite uneven, while the flood season’s runoff into Dongting Lake presented a trend of decreasing in general. (2)For Xiangtan station and Taojiang station, the first main cycle was 6 years; for Taoyuan station and Shimen station, the first main cycle was 4 years. (3)At Taojiang station and Taoyuan station, mutations occurred in 2003 and 2004, respectively. For Xiangtan station and Shimen station, there had been no mutation. (4)During the flood season, the distribution of runoff into Dongting Lake from the Four Rivers was quite uneven, however, the runoff distribution tended to be even over time. The monthly runoff showed a decreasing trend with fluctuation. As a whole, the indicators from the four stations presented a decreasing trend. (5)The grey correlation degree of the runoff distribution characteristics index value of Four Rivers into Dongting Lake during the flood season and river basin’s flood and drought disasters was extremely high, reflecting the situation of the basin’s flood and drought disasters.

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刘培亮,毛德华,周慧,等.1990—2013年湖南四水入洞庭湖汛期径流量的变化规律[J].水资源保护,2015,31(4):52-61.(LIU Peiliang, MAO Dehua, ZHOU Hui, et al. Variation law of runoff in flood seasons into Dongting Lake from Four Rivers in Hunan Province during 1990—2013[J]. Water Resources Protection,2015,31(4):52-61.(in Chinese))

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  • 收稿日期:2014-11-27
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  • 在线发布日期: 2015-08-03
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