globalchange  > 气候变化事实与影响
DOI: 10.5194/hess-19-4201-2015
Scopus记录号: 2-s2.0-84945256748
论文题名:
Multidecadal change in streamflow associated with anthropogenic disturbances in the tropical Andes
作者: Molina A; , Vanacker V; , Brisson E; , Mora D; , Balthazar V
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期:10
起始页码: 4201
结束页码: 4213
语种: 英语
Scopus关键词: Agriculture ; Atmospheric pressure ; Climate change ; Deforestation ; Forestry ; Reforestation ; Runoff ; Stream flow ; Time series ; Agricultural land ; Anthropogenic disturbance ; Empirical Mode Decomposition ; Headwater catchment ; Hydrometeorological data ; Land-cover change ; Southern oscillation ; Temporal variability ; Catchments ; agricultural land ; anthropogenic source ; climate change ; deforestation ; disturbance ; El Nino-Southern Oscillation ; headwater ; hydrological regime ; hydrometeorology ; land cover ; long-term change ; streamflow ; temporal variation ; tropical environment ; Andes
英文摘要: Andean headwater catchments are an important source of freshwater for downstream water users. However, few long-term studies exist on the relative importance of climate change and direct anthropogenic perturbations on flow regimes in these catchments. In this paper, we assess change in streamflow based on long time series of hydrometeorological data (1974-2008) and land cover reconstructions (1963-2009) in the Pangor catchment (282 km2) located in the tropical Andes. Three main land cover change trajectories can be distinguished during the period 1963-2009: (1) expansion of agricultural land by an area equal to 14 % of the catchment area (or 39 km2) in 46 years' time, (2) deforestation of native forests by 11 % (or - 31 km2) corresponding to a mean rate of 67 ha yrg-1, and (3) afforestation with exotic species in recent years by about 5 % (or 15 km2). Over the time period 1963-2009, about 50 % of the 64 km2 of native forests was cleared and converted to agricultural land. Given the strong temporal variability of precipitation and streamflow data related to El Niño-Southern Oscillation, we use empirical mode decomposition techniques to detrend the time series. The long-term increasing trend in rainfall is remarkably different from the observed changes in streamflow, which exhibit a decreasing trend. Hence, observed changes in streamflow are not the result of long-term change in precipitation but very likely result from anthropogenic disturbances associated with land cover change. © Author(s) 2015.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78406
Appears in Collections:气候变化事实与影响

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作者单位: Department of Earth and Environmental Sciences, KU Leuven, Celestijnenlaan 200E, Heverlee, Belgium; Programa para el Manejo del Agua y del Suelo (PROMAS), Universidad de Cuenca, Av. 12 de abril s/n, Cuenca, Ecuador; Department of Geology, Escuela Politécnica Nacional, Ladrón de Guevara, 11-253, Quito, Ecuador; Earth and Life Institute, Georges Lemaitre Centre for Earth and Climate Research, University of Louvain, Place Louis Pasteur 3, Louvain-la-Neuve, Belgium; Secretaria de Educación Superior, Ciencia, Tecnología e Innovación, Whymper E7-37 y Alpallana, Quito, Ecuador; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, Altenhöferallee 1, Frankfurt, Germany

Recommended Citation:
Molina A,, Vanacker V,, Brisson E,et al. Multidecadal change in streamflow associated with anthropogenic disturbances in the tropical Andes[J]. Hydrology and Earth System Sciences,2015-01-01,19(10)
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