Arid
DOI10.5194/hess-21-4149-2017
Evaporation from cultivated and semi-wild Sudanian Savanna in west Africa
Ceperley, Natalie C.1,2; Mande, Theophile2; van de Giesen, Nick3; Tyler, Scott4; Yacouba, Hamma5; Parlange, Marc B.1,2
通讯作者Ceperley, Natalie C.
来源期刊HYDROLOGY AND EARTH SYSTEM SCIENCES
ISSN1027-5606
EISSN1607-7938
出版年2017
卷号21期号:8页码:4149-4167
英文摘要

Rain-fed farming is the primary livelihood of semi-arid west Africa. Changes in land cover have the potential to affect precipitation, the critical resource for production. Turbulent flux measurements from two eddy-covariance towers and additional observations from a dense network of small, wireless meteorological stations combine to relate land cover (savanna forest and agriculture) to evaporation in a small (3.5 km(2)) catchment in Burkina Faso, west Africa. We observe larger sensible and latent heat fluxes over the savanna forest in the headwater area relative to the agricultural section of the watershed all year. Higher fluxes above the savanna forest are attributed to the greater number of exposed rocks and trees and the higher productivity of the forest compared to rain-fed, hand-farmed agricultural fields. Vegetation cover and soil moisture are found to be primary controls of the evaporative fraction. Satellite-derived vegetation index (NDVI) and soil moisture are determined to be good predictors of evaporative fraction, as indicators of the physical basis of evaporation. Our measurements provide an estimator that can be used to derive evaporative fraction when only NDVI is available. Such large-scale estimates of evaporative fraction from remotely sensed data are valuable where groundbased measurements are lacking, which is the case across the African continent and many other semi-arid areas. Evaporative fraction estimates can be combined, for example, with sensible heat from measurements of temperature variance, to provide an estimate of evaporation when only minimal meteorological measurements are available in remote regions of the world. These findings reinforce local cultural beliefs of the importance of forest fragments for climate regulation and may provide support to local decision makers and rural farmers in the maintenance of the forest areas.


类型Article
语种英语
国家Canada ; Switzerland ; Netherlands ; USA ; Burkina Faso
收录类别SCI-E
WOS记录号WOS:000408100500001
WOS关键词SURFACE-ENERGY BALANCE ; PART II ; VEGETATION ; FLUXES ; WATER ; SOIL ; FRACTION ; MODEL ; LAYER ; DYNAMICS
WOS类目Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Geology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199526
作者单位1.Univ British Columbia, Fac Appl Sci, Dept Civil Engn, Vancouver, BC, Canada;
2.Swiss Fed Inst Technol, Sch Architecture Civil & Environm Engn, Lab Environm Fluid Mech & Hydrol, Lausanne, Switzerland;
3.Delft Univ Technol, Dept Civil Engn & Geosci, Delft, Netherlands;
4.Univ Nevada, Dept Geol Sci & Engn, Reno, NV 89557 USA;
5.Int Inst Water & Environm Engn 2iE, Lab Hydrol & Resources Water, Ouagadougou, Burkina Faso
推荐引用方式
GB/T 7714
Ceperley, Natalie C.,Mande, Theophile,van de Giesen, Nick,et al. Evaporation from cultivated and semi-wild Sudanian Savanna in west Africa[J],2017,21(8):4149-4167.
APA Ceperley, Natalie C.,Mande, Theophile,van de Giesen, Nick,Tyler, Scott,Yacouba, Hamma,&Parlange, Marc B..(2017).Evaporation from cultivated and semi-wild Sudanian Savanna in west Africa.HYDROLOGY AND EARTH SYSTEM SCIENCES,21(8),4149-4167.
MLA Ceperley, Natalie C.,et al."Evaporation from cultivated and semi-wild Sudanian Savanna in west Africa".HYDROLOGY AND EARTH SYSTEM SCIENCES 21.8(2017):4149-4167.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Ceperley, Natalie C.]的文章
[Mande, Theophile]的文章
[van de Giesen, Nick]的文章
百度学术
百度学术中相似的文章
[Ceperley, Natalie C.]的文章
[Mande, Theophile]的文章
[van de Giesen, Nick]的文章
必应学术
必应学术中相似的文章
[Ceperley, Natalie C.]的文章
[Mande, Theophile]的文章
[van de Giesen, Nick]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。