Effect of Slope Length and Rainfall Intensity on Runoff and Erosion Conversion from Laboratory to Field


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

Predictions of soil and water loss at large extents often relies on data obtained from laboratory flume experiments. It is necessary to have a reliable approach to extrapolate from laboratory collected data to larger field areas. In this study, a series of experiments were designed using rainfall simulator on laboratory flumes with varying surface areas (ranging from 0.5 to 2.5 m2) as well as field plots ranging in surface areas between 4 and 20 m2. Both the flumes and field plots had the same slope gradient (20°), surface trait (bare slope) and soil type (red soil). We varied rainfall intensities from 30 to 150 mm/h, and measured runoff and erosion. Results confirmed that actual erosion in field cannot be simply extrapolated from laboratory data, rather we showed that erosion modulus directly relates to surface area and rainfall intensity in both the laboratory and field experiments. However, the effect of surface area on runoff is more complicated. Compared to surface area, rainfall intensity showed more pronounced influence on runoff. Based on our experimental results, a conversion calculation method was investigated and a conversion coefficient model, which is a function of rainfall intensity and ratio of field area to laboratory area, was introduced. The model provides a reference for laboratory to field conversions and allows for soil erosion prediction at larger extents in the field.

Авторлар туралы

X. Fu

College of Water Conservancy Science and Engineering, Taiyuan University of Technology

Хат алмасуға жауапты Автор.
Email: fuxingtao@tyut.edu.cn
ҚХР, Taiyuan, 030024

L. Zhang

College of Environmental and Resource Sciences, Zhejiang University

Хат алмасуға жауапты Автор.
Email: lpzhang@zju.edu.cn
ҚХР, Hangzhou, 310058

Y. Wang

School of Computing, Science and Engineering, University of Salford

Хат алмасуға жауапты Автор.
Email: Y.Wang@salford.ac.uk
Ұлыбритания, Manchester, M5 4WT

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML

© Pleiades Publishing, Ltd., 2019