Distribution Characteristics of Yunnan Province Atmospheric Water Resource

Tao Yun; Zhao Di; He Hua; Gao Xishuai; Zheng Jianmeng; Huang Wei

Vol.18, NO.4, 2007

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2007 > 18(4): 506-515

Tao Yun, Zhao Di, He Hua, et al. Distribution characteristics of Yunnan Province atmospheric water resource. J Appl Meteor Sci, 2007, 18(4): 506-515.

Citation:

Tao Yun, Zhao Di, He Hua, et al. Distribution characteristics of Yunnan Province atmospheric water resource. J Appl Meteor Sci, 2007, 18(4): 506-515.

Tao Yun, Zhao Di, He Hua, et al. Distribution characteristics of Yunnan Province atmospheric water resource. J Appl Meteor Sci, 2007, 18(4): 506-515.

Citation:

Tao Yun, Zhao Di, He Hua, et al. Distribution characteristics of Yunnan Province atmospheric water resource. J Appl Meteor Sci, 2007, 18(4): 506-515.

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Distribution Characteristics of Yunnan Province Atmospheric Water Resource

1.
Yunnan Provincal Climate Center, Kunming 650034
2.
Atmospheric Science Department, Yunnan University, Kunming 650091
3.
Yunnan Provincal Meteorological Observatory, Kunming 650034
4.
Yunnan Provincal Meteorological Bureau, Kunming 650034

Received Date: 2006-04-03
Rev Recd Date: 2007-01-22
Publish Date: 2007-08-31

Abstract

Abstract

Using the monthly precipitation and temperature of Yunnan 124 stations from 1961 to 2004, the water resource components, such as the evaporation (E) and utilizable rainfall (P-E), are calculated by means of Takahashi's evaporation equation. The temporal and spatial features of water resource components and their periods are also analyzed. Results indicate that components (P, E, P-E) of water resource in southern area are higher than that of northern area. The grads in southern area are big and that in northern area are small. 44-year average P-E and have very similar spatial and temporal distribution. The biggest and smallest center of P-E are unanimously corresponding with P, but the value of P-E is smaller than P. The components (P, E, P-E) of water resource in Yunnan have obvious seasonal changes. The biggest value of the components (P, E, P-E) appears in summer. Their annual average values are 548 mm, 236 mm, 313 mm respectively and their ratios to the whole year are respectively 55%, 45% and 67%. The smallest value of the components (P, E, P-E) appears in winter and their ratios to the whole year are respectively 5%, 7%and 2%. The components (P, E, P-E) of water resource in Yunnan also have obvious inter-monthly, interannual and interdecadal changes. The biggest value appears in July and the smallest appears in January or December. The difference between the maximum and the minimum of components (P, E, P-E) of water resource is very large. At the same time, the interdecadal difference of components (P, E, P-E) of water resource is also very obvious. P and P-E are relatively abundant from 1960s to the middle of 1970s, they are less from mid 1970s to mid 1990s and more after mid 1990s. By the power spectrum period analysis method, it is revealed that there is a significant period of 2.6 years in total annual rainfall and total annual utilizable rainfall and there is a significant period of 2.9 years in total annual evaporation. The water resource of Yunnan Province is divided into three regions:abundant region, poor region and general region. There are very obvious differences among regional and annual mean utilizable rainfall, evaporation and rainfall of the three regions.
- water resource of Yunnan Province;
- temporal and spatial variation;
- significant period;
- divisions of water resource

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References(18)

Figures and Tables

图 1 1961—2004年云南平均年降水量P (a)、年蒸发量E (b)、年可利用降水量P-E (c) (单位:mm) 及年蒸发率 (d) (单位:%) 分布

Fig. 1 Distribution of 44-year averaged P (a), E (b), P-E (c) (unit:mm) and (d) (unit:%) in Yunnan Province

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图 2 1961—2004年云南59个代表站平均的大气中水资源各分量及气温月际变化平均曲线

Fig. 2 44-year averaged monthly variation of atmospheric water resource components and air temperature of 59 stations average in 1961—2004

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图 3 1961—2004年云南59个代表站平均年大气中水资源各分量标准化距平演变

Fig. 3 The standard anomaly temporal evolvement of annual averaged atmospheric water resource components of 59 stations in 1961—2004

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图 4 1961—2004年云南典型涝年蒸发量E (a)、可利用降水量P-E (b) 和典型旱年蒸发量E (c)、可利用降水量P-E (d) 距平分布 (单位:mm)

Fig. 4 The anomaly distribution of E (a), P-E (b) in the typical flood years and E (c), P-E (d) in the typical drought years in 1961—2004 (unit:mm)

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图 5 云南大气中水资源区划图

(阴影区:水资源丰富区; 斜线区:水资源贫乏区; 非阴影区:水资源一般区)

Fig. 5 The divisions of atmospheric water resource of Yunnan Province

(shaded area:abundant region; bias diagonal area:poor region; non-shaded area:general region)

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表 1 1961—2004年云南59个代表站平均各季及全年水资源各分量平均气候特征

Table 1 44-year averaged seasonal and annual climate features of water resource components of 59 stations in 1961—2004

表 2 1961—2004年云南59个代表站平均的各季及年平均气温、降水与水资源分量之间的相关关系

Table 2 Correlation coefficients between temperature, precipitation and water resource components of 59 stations mean in 1961—2004

表 3 1961—2004年云南59个代表站平均大气中水资源各分量的极值 (单位:mm)

Table 3 The extremum of atmospheric water resource components of 59 stations in 1961—2004 (unit:mm)

表 4 1961—2004年云南59个代表站平均各季及全年在旱涝年时大气中水资源各分量平均特征

Table 4 44-year averaged seasonal and annual climate features of atmospheric water resource components of 59 stations in drought and flood years

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