Is Small Better? A Comparison of the Effect of Large and Small Dams on Cropland Productivity in South Africa
No hay miniatura disponible
Fecha
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
World Bank, Washington, DC
Resumen
Descripción
This study estimates and compares the
effects of small and large irrigation dams on cropland
productivity in South Africa. To this end, a panel data set
of South African river basins is constructed. The
econometric analysis reveals that although large dams
increase cropland productivity downstream, they have a
negative effect on cropland within the vicinity. However,
their existence can enhance the relatively small positive
impact of local small dams. Although a cost-benefit analysis
of irrigation benefits shows that small dams may be more
viable than large ones, large dams can play a potentially
important role within a system of both types of dams.
Palabras clave
AGRICULTURAL PRODUCTION, AGRICULTURAL PRODUCTIVITY, AGRICULTURAL WATER, BASIN, BASIN BOUNDARIES, BASIN LEVEL, CANAL, CANAL NETWORK, CAPACITY BUILDING, CATCHMENT, CATCHMENT AREA, CATCHMENT AREAS, CATCHMENTS, CLIMATE CHANGE, CONSTRUCTION COSTS, COVERING, CUBIC METERS, DAM BUILDING, DAM CLASSIFICATION, DAM DEVELOPMENT, DAM ENGINEERING, DAM FAILURE, DAM HEIGHT, DAM LOCATION, DAM SAFETY, DAM WALL, DRAINAGE, DRAINAGE BASIN, EARLY WARNING SYSTEM, EARTH DAMS, EARTHEN DAMS, EMBANKMENT, EMBANKMENT DAMS, ENVIRONMENTAL COSTS, ENVIRONMENTAL DEGRADATION, FILL DAMS, FILL EMBANKMENT, FLOOD CONTROL, FLOODS, FLOW OF WATER, GRAVITY, GRAVITY DAMS, HAZARD POTENTIAL, HYDRAULIC CONDUCTIVITY, HYDROLOGICAL CYCLE, HYDROLOGICAL MODEL, HYDROLOGY, HYDROPOWER, HYDROPOWER PRODUCTION, IMPACT OF DAM, IMPACT OF DAMS, INTEGRATED WATER RESOURCES MANAGEMENT, INTERNATIONAL WATER, IRRIGATED AREA, IRRIGATION CANAL, IRRIGATION INVESTMENT, IRRIGATION WATER, LAKE, LARGE DAM, LARGE DAM CONSTRUCTION, LARGE DAMS, LARGE IRRIGATION, LARGE-SCALE INFRASTRUCTURE, LARGER DAM, LOCAL RIVER, LOCALITY, MANAGEMENT PRACTICES, NATURAL RESOURCES, RAIN, RAINFALL, RAINWATER, RAINWATER HARVESTING, REMOTE SENSING, RESERVOIR, RESERVOIR CAPACITY, RIPARIAN, RIPARIAN RIGHTS, RIVER, RIVER BASIN, RIVER BASIN AREA, RIVER BASIN MANAGEMENT, RIVER BASIN SCALE, RIVER BASINS, RIVER FLOW, RIVER LENGTH, RIVER NETWORK, RIVERS, RUNOFF, SALINITY, SAND DAM, SAND DAMS, SEEPAGE, SMALL DAM, SMALL DAMS, SMALLER DAMS, STORAGE CAPACITY, STREAM, STREAM FLOW, STREAMFLOW, SURFACE AREA, TREE COVER, UPSTREAM DAM, UPSTREAM DAMS, USE OF DAMS, WATER HARVESTING, WATER LOGGING, WATER RESOURCES, WATER RIGHTS, WATER STORAGE, WATER SUPPLY, WATER SUPPLY MANAGEMENT, WATER TRANSFER, WATER USE