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不同降雨条件下天然次生林水文过程动态分析(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2010年06期
Page:
57-60
Column:
研究论文
publishdate:
2010-11-30

Article Info:/Info

Title:
Dynamic analysis of hydrological processes of natural secondary forest in different rainfall conditions
Author(s):
WANG Xiaoming1 ZHOU Benzhi1 ZHONG Shaozhu2 KONG Weijian1 WANG Gang1 XU Shenghua3
1.Research Institute of Subtropical Forestry, CAF, Fuyang 311400, China; 2.Fuyang Water Conservancy Bureau, Fuyang 311400, China; 3.Fuyang Forestry Bureau, Fuyang 311400, China
Keywords:
natural secondary forest watershed forest hydrologic process
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2010.06.013
Document Code:
A
Abstract:
Hydrological processes of natural secondary forest ecosystem in Qianjiangyuan ecology station were studied in this paper.By observation,we got the following results:(1)The effect of early soil moisture condition on runoff was significant. The maximum runoff of natural secondary forest watershed lagged about 5—7 hours behind maximum precipitation intensity in early dry to medium moist conditions, whereas the lag time was reduced to one hour in moist condition. (2)Soil moisture differed significantly with different depth. Soil moisture in 5 cm soil layer was minimum, followed by that in 20 cm and 50 cm soil layers, and maximum in 10 cm soil layer. (3)The maximum soil moisture in different soil layers lagged different time with the appearance of maximum precipitation intensity in different rainfall intensities. The maximum soil moisture lagged about 2—6 hours behind maximum precipitation intensity in early dry to medium moist conditions, whereas the two side appeared at the same time in early moist conditions.

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Last Update: 2010-12-27