韩江流域参考作物蒸散量时空变化及其影响因素
发布时间：2018-10-13 19:50
【摘要】：基于韩江流域12个气象站点1961—2013年的逐日气象数据,应用Penman-Monteith公式计算参考作物蒸散量(ET_0),并利用Mann-Kendall检验、Kring插值、Pearson相关分析和敏感性系数等方法分析了韩江流域ET_0的时空变化特征及其影响因素.结果表明:(1)近53年来,韩江流域多年平均ET_0为1 121.96 mm,整体呈下降趋势,速率为0.39 mm/a,在1967年左右发生突变.全流域ET_0的年内变化较为明显,夏季的贡献最大,占到全年的37%;年均ET_0以广东最多,江西最少.(2)空间上,韩江流域ET_0呈现"自东南向西北逐渐递减"、"三高一低"的分布格局,即韩江上游梅江源头地区、韩江三角洲以及梅潭河流域为明显的高值区,而汀江上游地区的值相对较低;四季ET_0的空间分布与年高低值的分布格局基本一致.(3)韩江流域ET_0对相对湿度呈负敏感性,对平均气温、日照时数和平均风速呈正敏感性,对相对湿度最为敏感,其次是平均温度,对日照时数和平均风速的敏感性相对较小.(4)平均风速下降是该流域ET_0减少的主要原因,其次是相对湿度.所得结论为山区流域水循环研究奠定了一定的基础,可为区域水资源评价与管理提供参考依据.
[Abstract]:Based on daily meteorological data from 12 meteorological stations in the Hanjiang River Basin from 1961 to 2013, The reference crop evapotranspiration (ET_0) was calculated by Penman-Monteith formula, and the spatio-temporal variation characteristics of ET_0 and its influencing factors were analyzed by means of Mann-Kendall test, Kring interpolation, Pearson correlation analysis and sensitivity coefficient. The results showed that: (1) in recent 53 years, the average annual ET_0 of Hanjiang River basin was 1 121.96 mm, and the rate of 0.39 mm/a, mutation occurred in 1967. The variation of ET_0 in the whole basin is obvious in the year, and the contribution in summer is the largest, accounting for 37% of the whole year. The average annual ET_0 is the most in Guangdong and the least in Jiangxi. (2) in space, the ET_0 of Hanjiang River basin is gradually decreasing from southeast to northwest, and the distribution pattern of "three high, one low". In other words, the source area of the Meijiang River in the upper reaches of Han River, the Han River Delta and the Meitan River basin are obvious high value areas, while the value of the upper reaches of the Ting River is relatively low. The spatial distribution of ET_0 in four seasons is basically consistent with the distribution pattern of annual high and low values. (3) ET_0 is negative sensitive to relative humidity, positively sensitive to mean temperature, sunshine hours and mean wind speed, and most sensitive to relative humidity. The second is average temperature, and the sensitivity to sunshine hours and mean wind speed is relatively small. (4) the decrease of mean wind speed is the main reason for the decrease of ET_0, and the second is relative humidity. The conclusion lays a foundation for the study of water circulation in mountain basin and can provide reference for regional water resources evaluation and management.
【作者单位】： 华南师范大学地理科学学院;
【基金】：国家自然科学基金项目(41471147)
【分类号】：S311
[Abstract]:Based on daily meteorological data from 12 meteorological stations in the Hanjiang River Basin from 1961 to 2013, The reference crop evapotranspiration (ET_0) was calculated by Penman-Monteith formula, and the spatio-temporal variation characteristics of ET_0 and its influencing factors were analyzed by means of Mann-Kendall test, Kring interpolation, Pearson correlation analysis and sensitivity coefficient. The results showed that: (1) in recent 53 years, the average annual ET_0 of Hanjiang River basin was 1 121.96 mm, and the rate of 0.39 mm/a, mutation occurred in 1967. The variation of ET_0 in the whole basin is obvious in the year, and the contribution in summer is the largest, accounting for 37% of the whole year. The average annual ET_0 is the most in Guangdong and the least in Jiangxi. (2) in space, the ET_0 of Hanjiang River basin is gradually decreasing from southeast to northwest, and the distribution pattern of "three high, one low". In other words, the source area of the Meijiang River in the upper reaches of Han River, the Han River Delta and the Meitan River basin are obvious high value areas, while the value of the upper reaches of the Ting River is relatively low. The spatial distribution of ET_0 in four seasons is basically consistent with the distribution pattern of annual high and low values. (3) ET_0 is negative sensitive to relative humidity, positively sensitive to mean temperature, sunshine hours and mean wind speed, and most sensitive to relative humidity. The second is average temperature, and the sensitivity to sunshine hours and mean wind speed is relatively small. (4) the decrease of mean wind speed is the main reason for the decrease of ET_0, and the second is relative humidity. The conclusion lays a foundation for the study of water circulation in mountain basin and can provide reference for regional water resources evaluation and management.
【作者单位】： 华南师范大学地理科学学院;
【基金】：国家自然科学基金项目(41471147)
【分类号】：S311
【参考文献】
相关期刊论文 前10条
1 袁宇志;张正栋;蒙金华;;基于SWAT模型的流溪河流域土地利用与气候变化对径流的影响[J];应用生态学报;2015年04期
2 黄强;陈子q，
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