HYDROCHEMICAL DECIPHERING OF STREAMFLOW GENERATION IN SEMI-ARID EAST AFRICA
作者： KLAS SANDSTRÖM
DOI: 10.1002/(SICI)1099-1085(199605)10:5<703::AID-HYP313>3.0.CO;2-#
关键词: Hydrology 、 Arid 、 Riparian zone 、 Streamflow 、 Throughflow 、 Groundwater 、 Groundwater discharge 、 Hydrograph 、 Surface runoff 、 Environmental science
摘要: There is a critical lack of knowledge regarding the dynamics streamflow generation in semi-arid tropics, particularly Africa. In this project runoff mechanisms forested and non-forested degraded catchments northern Tanzania were studied using combined hydrometrical hydrochemical methods. Following identification several flowpaths contributing to runoff, hydrograph separation by an end-member model based on K Ca was undertaken. Results from catchment indicate that stormflow dominated event water (about 75%), via overland flow throughflow. The proportion pre-event (groundwater) displaced into stream suggested riparian groundwater ridge mechanism varied, depending rainfall characteristics. non-forested, catchment, nearly all water, discharge unaffected rainfall. It macropore pivotal transmission throughflow, tropical areas.
harvard.edu
sci-hub.se 参考文章(30)
Marija J. Norusis, SPSS for Windows : professional statistics, release 5 SPSS Inc.. ,(1992)
J.M. Buttle, K. Sami, Testing the groundwater ridging hypothesis of streamflow generation during snowmelt in a forested catchment Journal of Hydrology. ,vol. 135, pp. 53- 72 ,(1992) , 10.1016/0022-1694(92)90080-F
Keith Beven, Peter Germann, Macropores and water flow in soils Water Resources Research. ,vol. 18, pp. 1311- 1325 ,(1982) , 10.1029/WR018I005P01311
J.M. Buttle, Isotope hydrograph separations and rapid delivery of pre-event water from drainage basins: Progress in Physical Geography. ,vol. 18, pp. 16- 41 ,(1994) , 10.1177/030913339401800102
Patrick J. Mulholland, Glenn V. Wilson, Philip M. Jardine, Hydrogeochemical Response of a Forested Watershed to Storms: Effects of Preferential Flow Along Shallow and Deep Pathways Water Resources Research. ,vol. 26, pp. 3021- 3036 ,(1990) , 10.1029/WR026I012P03021
Patrick J. Mulholland, Hydrometric and stream chemistry evidence of three storm flowpaths in Walker Branch Watershed Journal of Hydrology. ,vol. 151, pp. 291- 316 ,(1993) , 10.1016/0022-1694(93)90240-A
Christoph Wels, R.Jack Cornett, Bruce D. Lazerte, Hydrograph separation: A comparison of geochemical and isotopic tracers Journal of Hydrology. ,vol. 122, pp. 253- 274 ,(1991) , 10.1016/0022-1694(91)90181-G
Richard P. Hooper, Nils Christophersen, Norman E. Peters, Modelling streamwater chemistry as a mixture of soilwater end-members ― an application to the Panola Mountain catchment, Georgia, U.S.A. Journal of Hydrology. ,vol. 116, pp. 321- 343 ,(1990) , 10.1016/0022-1694(90)90131-G
Roy C. Ward, On the response to precipitation of headwater streams in humid areas Journal of Hydrology. ,vol. 74, pp. 171- 189 ,(1984) , 10.1016/0022-1694(84)90147-1
George F. Pinder, John F. Jones, Determination of the ground-water component of peak discharge from the chemistry of total runoff Water Resources Research. ,vol. 5, pp. 438- 445 ,(1969) , 10.1029/WR005I002P00438