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Wetlands can only be well managed if their spatial location and extent are accurately documented, which presents a problem as wetland type and morphology are highly variable. Current efforts to delineate wetland extent are varied, resulting in a host of inconsistent and incomparable inventories. ...


Nhamo, LuxonMagidi, J.Dickens, Chris[Determining wetland spatial extent and seasonal variations of the inundated area using multispectral remote sensing]Determining wetland spatial extent and seasonal variations of the inundated area using multispectral remote sensing

Multifunctional soil conservation strategies have the capacity to control soil erosion as well as increase its quality, thus leading to sustained yields as long as planners have knowledge on the severity of soil loss. A comprehensive methodology that integrates Revised Universal Soil Loss Equatio...


Kabirigi, M.Mugambi, S.Musana, B.S.Ngoga, G.T.Muhutu, J.C.Rutebuka, J.Ruganzu, V.Nzeyimana, I.Nabahungu, N.L.[Estimation of soil erosion risk, its valuation and economic implications for agricultural production in western part of Rwanda]Estimation of soil erosion risk, its valuation and economic implications for agricultural production in western part of Rwanda

Cassava viruses are the major biotic constraint to cassava production in Africa. Community-wide action to manage them has not been attempted since a successful cassava mosaic disease control programme in the 1930s/40 s in Uganda. A pilot initiative to investigate the effectiveness of community ph...


Legg, J.P.Ndalahwa, M.Yabeja, J.Ndyetabula, I.Bouwmeester, H.J.Shirima, R.Mtunda, K.[Community phytosanitation to manage cassava brown streak disease]Community phytosanitation to manage cassava brown streak disease

Maps of abiotic stresses for rice can be useful for (1) prioritizing research and (2) identifying stress hotspots, for directing technologies and varieties to those areas where they are most needed. Large-scale maps of stresses are not available for Africa. This paper considers four abiotic stres...


Oort, P.A.J. van[Mapping abiotic stresses for rice in Africa: Drought, cold, iron toxicity, salinity and sodicity]Mapping abiotic stresses for rice in Africa: Drought, cold, iron toxicity, salinity and sodicity

Geographic modelers frequently compare maps of observed land transitions to maps of simulated land transitions to relate the patterns in reference maps to the output from a simulation model. Pixel-by-pixel analysis of raster maps at a single resolution is useful for this task at a single scale, b...


Pontius, R.G. JrPeethambaram, S.Castella, J.C.[Comparison of three maps at multiple resolutions: a case study of land change simulation in Cho Don District, Vietnam]Comparison of three maps at multiple resolutions: a case study of land change simulation in Cho Don District, Vietnam

The spatial distribution of surface and subsurface soil attributes is an important input to environmental modeling. Soil attributes represent an important input to the Soil and Water Assessment Tool (SWAT), which influence the accuracy of the modeling outputs. An ArcGIS-based tool was developed t...


Ziadat, F.M.Dhanesh, Y.Shoemate, D.Srinivasan, R.Narasimhan, B.Tech, J.[Soil-Landscape Estimation and Evaluation Program (SLEEP) to predict spatial distribution of soil attributes for environmental modeling.]Soil-Landscape Estimation and Evaluation Program (SLEEP) to predict spatial distribution of soil attributes for environmental modeling.

Estimating the potential land resources suitable for irrigation and evaluating the possible impact of climate change on land suitability is essential for planning a sustainable agricultural system. This study applied a GIS-based Multi-Criteria Evaluation (MCE) technique to evaluate the suitabilit...


Worqlul, A.W.Dile, Y.T.Jeong, J.Adimassu, ZenebeLefore, NicoleGerik, T.Srinivasan, R.Clarke, N.[Effect of climate change on land suitability for surface irrigation and irrigation potential of the shallow groundwater in Ghana]Effect of climate change on land suitability for surface irrigation and irrigation potential of the shallow groundwater in Ghana

Cassava mosaic disease (CMD) seriously affects cassava yields in Africa. This study compared the spatial distribution of CMD using three independent surveys in Rwanda and Burundi. Geostatistical techniques were used to interpolate the pointbased surveys and predict the spatial distributions of di...


Bouwmeester, H.J.Heuvelink, Gerard B.M.Legg, J.P.Stoorvogel, J.J.[Comparison of disease patterns assessed by three independent surveys of cassava mosaic virus disease in Rwanda and Burundi]Comparison of disease patterns assessed by three independent surveys of cassava mosaic virus disease in Rwanda and Burundi

Despite the potential for economic growth, extractive mineral industries can impose negative health externalities in mining communities. We estimate the size of these externalities by combining household interviews with mine location and estimating statistical functions of respiratory illness and...


Saha, S.Pattanayak, S.K.Sills, E.O.Singha, A.K.[Under-mining health: environmental justice and mining in India]Under-mining health: environmental justice and mining in India

Estimation of the mineral resources potential is an important issue for most of developing countries. The spatial distribution of bauxites and lateritic land surfaces on the Bamiléké plateau (West Cameroon) has been investigated with a Boolean modeling process into a GIS environment on the basis ...


Momo, M.N.Yemefack, M.Tematio, P.Beauvais, A.Ambrosi, J.[Distribution of duricrusted bauxites and laterites on the Bamiléké plateau (West Cameroon): constraints from GIS mapping and geochemistry]Distribution of duricrusted bauxites and laterites on the Bamiléké plateau (West Cameroon): constraints from GIS mapping and geochemistry

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