甘肃泾川3种径级刺槐林的冠层截留降雨作用

doi:10.11707/j.1001-7488.20140303

Abstract

Abstract:

The hydrological effects of canopy interception of three stands of black locust (Robinia pseudoacacia) with different DBH ranges were studied at the Zhonggou small watershed, Jingchuan County, Gansu Province of China, during the growing season (June-October) in 2010. The total rainfall during the study period amounted to 221.1 mm. The ratio of total canopy interception to total rainfall for the stands with the DBH range of 6.1-10.0, 14.1-18.0, 22.1-26.0 cm were 13.16%, 15.11% and 18.44%, respectively. The corresponding stem flow ratio was 6.15%, 5.49% and 0.85% and the throughfall ratio was 80.69%, 79.40% and 80.79%. There was a trend that the canopy interception increased with increasing DBH of forest stands, and the stem flow decreased, with unchanged in throughfall ratio. During single rainfall events, with increasing rainfall strength, the canopy interception increased in logarithmic form and the canopy interception ratio decreased in logarithmic form; the stem flow increased in lineal form and the stem flow ratio increased in logarithmic form; the throughfall increased in lineal form and the throughfall ratio increased in exponential form. The rainfall of 20 mm is a threshold for the change rate of interception.

Key words: Loess Plateau, black locust plantation, DBH ranges, canopy interception, throughfall, stemflow

CLC Number:

S715.2

Wang Anmin, Ren Ye, Wang Yanhui, Han Fen, Zhang Junming. Canopy Interception Effects of Three Stands of Black Locust with Different DBH Ranges at Jingchuan, Gansu, China[J]. Scientia Silvae Sinicae, 2014, 50(3): 16-21.

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Canopy Interception Effects of Three Stands of Black Locust with Different DBH Ranges at Jingchuan, Gansu, China

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