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Runoff generation on a semi-arid agricultural catchment: Field and experimental studies
Zhu, TX; Cai, QG; Zeng, BQ
1997-09-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume196Issue:1-4Pages:99-118
Corresponding AuthorZhu, TX()
AbstractRunoff generation on a small semi-arid agricultural catchment with mixed land use in the Loess Plateau of China was monitored over a 19-year period. To investigate the possible spatial variations in runoff generation on the catchment, eight plots were set up on various sections of the hillslope and monitored for 6 years. Only a small proportion of rainfall events generated runoff, contrary to the assumption that rainstorms in this area are characterized by high intensity and short duration, and thereby lead to runoff generation, Runoff occurrence and yields were also found to be highly variable within the catchment. To explore further the results obtained from the field observations, portable and downspraying sprinklers were used in field experiments. Both produce similar rainfall intensities but the raindrops from the portable sprinkler have very low kinetic energy and do not break down aggregates and form crusting, while raindrops produced by the downspraying sprinkler have similar characteristics to natural rainfall. A comparison of the experimental results obtained by those two kinds of sprinklers dearly demonstrated that runoff generation in this area is largely affected by surface crusting. The effects on runoff generation of the crusts formed during previous storms and the present storm were examined experimentally. Finally, the impacts of cultivation and plowing on runoff generation were determined through field investigation and experiments. This study suggests that there is considerable potential to reduce runoff and erosion, and to increase soil moisture and crop yields on the Loess Plateau through changes of currently inappropriate land use and the improvement of land management. (C) 1997 Elsevier Science B.V.
Indexed BySCI
Language英语
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:A1997XM70600006
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/56698
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhu, TX
Affiliation1.CHINESE ACAD SCI,INST GEOG,BEIJING 100101,PEOPLES R CHINA
2.SHANXI INST SOIL & WATER CONSERVAT,LISHI 033000,SHANXI PROVINCE,PEOPLES R CHINA
Recommended Citation
GB/T 7714
Zhu, TX,Cai, QG,Zeng, BQ. Runoff generation on a semi-arid agricultural catchment: Field and experimental studies[J]. JOURNAL OF HYDROLOGY,1997,196(1-4):99-118.
APA Zhu, TX,Cai, QG,&Zeng, BQ.(1997).Runoff generation on a semi-arid agricultural catchment: Field and experimental studies.JOURNAL OF HYDROLOGY,196(1-4),99-118.
MLA Zhu, TX,et al."Runoff generation on a semi-arid agricultural catchment: Field and experimental studies".JOURNAL OF HYDROLOGY 196.1-4(1997):99-118.
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