IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
Alternative TitleStudy on Hydrological Characteristics and Modelling methods of Subalpine Forest in Upper Reaches of the Yangtze River
Thesis Advisor程根伟
Degree Grantor中国科学院成都山地灾害与环境研究所
Place of Conferral成都
Degree Name硕士
Degree Discipline自然地理学
Keyword贡嘎山 亚高山 森林 水文特征 降雨-径流模拟 水文效应
Other AbstractUsing the field observation and mathematic modelling mothed, hydrological characteristics of subalpine forest in upper reaches of the Yangtze River are studied in this paper. According to the long-term observational data of the subalpine hydrological system, average annual precipitation for subalpine dark coniferous forest on the eastern slope of Mt. Gongga is 1926.3mm, accounting for 79.72% in wet season and only 20.28% in dry season. Average wind velocity is 0.6m/s and its seasonal change is slight. Average annual relative humidity is 90.7% with variation coefficient of only 0.03 in a year. Wind velocity and relative humidity have little effect on potential evapotranspiration in subalpine dark coniferous forest of Mt. Gongga. Penman equation is applied to calculate potential evapotranspiration of subalpine dark coniferous forest on the eastern slope of Mt. Gongga. The Penman method gives an annual potential evapotranspiration rate of 431.8mm/yr, which is higher than the annual pan evaporation rate of 346.1mm/yr in the same period. From April to October(growth season), the potential evapotranspiration of dark forest is higher than pan evaporation outside forest. However, between November and May, the potential evapotranspiration of dark forest is equal to pan evaporation outside forest. The canopy interception of Abies fabri in Huangbengliu Watershed is gradually increased with rainfall. The maximum of interception is about 20mm. However, the interception rate is gradually decreased with the augmentation of rainfall. The interception rate is about 40% as the rainfall less than 10mm and low 40% as the rainfall greater than 10mm. The maximum water-holding capacity of moss and litter is 4.84mm under Abies fabri forest, and the maximum active water-holding capacity is 3.93mm. Considering the features of the forested watershed, the author develops a lumped model by using the conceptual hydrological modelling mothed. Using this model, the hydrological process of C watershed and H watershed in Carnation Creek(Canada) and Huangbengliu Creek(China) are modeled. The modelling result of H watershed gives an insight of the change of the streamflow components. After clear-cutting in H watershed, the surface flow increased 0.85%, the interflow increased 13.48%, shallow ground water decreased 14.33%. This result show that forest is help to turn the surface flow and interflow into ground water. As a consequence of deforestation, the function of canopy to rainfall redistribution may lost the infiltration time of the storge water in woodland is decrease, the surface flow will increase, runoff concentrate to stream more quick. After deforestation the flood discharge will increase in H catchment, the average modulus of runoff has increased by 30.3%.
Document Type学位论文
Recommended Citation
GB/T 7714
周杨明. 长江上游亚高山森林区水文特征与模拟方法研究[D]. 成都. 中国科学院成都山地灾害与环境研究所,2002.
Files in This Item:
File Name/Size DocType Version Access License
长江上游亚高山森林区水文特征与模拟方法研(1566KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[周杨明]'s Articles
Baidu academic
Similar articles in Baidu academic
[周杨明]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[周杨明]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 长江上游亚高山森林区水文特征与模拟方法研究.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.