• 资源评价 •

### 嘉陵江流域降水变化及旱涝多时间尺度分析

1. 1. 绵阳师范学院资源环境工程学院, 四川绵阳621000;
2. 陕西师范大学旅游与环境学院, 西安710062
• 收稿日期:2014-03-19 修回日期:2014-08-26 出版日期:2015-05-20 发布日期:2015-05-20
• 通讯作者: 延军平,E-mail:yanjp@snnu.edu.cn E-mail:yanjp@snnu.edu.cn
• 作者简介:杜华明(1977-),女,四川广元人,讲师,博士研究生,主要从事区域环境与灾害方向研究。E-mail:dhuaming2004@163.com
• 基金资助:

国家自然科学基金项目(41171090)“部分重大自然灾害的时空对称性:结构、机理与适应对策”。

### The Distribution of Precipitation and Multi-temporal Scales Drought-flood Analysis in the Jialing River Basin

DU Hua-ming1,2, YAN Jun-ping2, YANG Deng-xing2, YANG Rong2

1. 1. College of Resources and Environmental Engineering, Mianyang Normal University, Mianyang 621000, China;
2. College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, China
• Received:2014-03-19 Revised:2014-08-26 Online:2015-05-20 Published:2015-05-20

Abstract:

Based on the meteorological data in the Jialing River Basin from 1961 to 2012, the distribution of precipitation and drought-flood were analyzed by using the methods of mathematical statistics and GIS spatial analysis. The results showed that: In the past 52 years the annual average precipitation had a decreased trend in the Jialing River Basin with the rate of 13.69 mm/10 a, the sudden precipitation reduction occurred in 1984. The trends of seasonal precipitation varied greatly, that summer and winter precipitation increased by the rate of 5.76 mm/10 a and 0.64 mm/10 a respectively, and spring and autumn precipitation decreased by the rate of 5.1 mm/10 a and 15.16 mm/10 a respectively. Affected by the monsoon and the altitude, the precipitation had distinct spatial difference in the Jialing River Basin. The precipitation in this basin showed a decreasing trend from the southeast to the northwest. The annual average precipitation was 1000.01-1254.63 mm in the east of Bazhong-Langzhong-Suining, 800.01-1000.00 mm in the east of Lueyang-Mianyang and west of Bazhong-Langzhong-Suining, and it was 464.59-800.00 mm in the west of Lueyang-Mianyang. The precipitation showed a decreasing trend except that in Daxian and Shapingba. The areas in the east of Bazhong-Langzhong-Suining and in Wudu region had the most reduction of precipitation, with the rate of -0.01 mm/10 a--10.00 mm/10 a. The precipitation largely reduced in the line of Lueyang-Guangyuan-Mianyang, with the rate of -20.01 mm/10 a--39.08 mm/10 a. The frequency of waterlogging was high in the 1960s. The drought and flood disasters appeared alternately in the 1970s and 1980s, but it was overall waterlogged; it was droughty since the 1990s, that the frequency and the degree of drought were higher than that waterlogging. The Jialing River Basin became increasingly dry in recent 52 years. However, 1990 was a turning point that this area was flood before 1990 and drought after 1990. It was coherent with the precipitation in this area, which had an obvious waterlogging to drought trend, and the trend of drought was persistent. More attention should be paid to the drought control work.

• P426.616