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Displaying 126 - 130 of 164Drainage development: Driving forces, conducive conditions and development trajectories
The core of this paper consists of an analysis of the forces and conducive conditions which historically have driven the drainage development of agricultural land. Such forces and conditions are recognised at three levels of discretion: (i) the generic level (ii) the government level (iii) the on‐farm level. The drainage development for salinity control of irrigated land in the (semi) arid zone is treated as a special case of drainage development driven by its own specific forces and considerations.
Improving irrigation water operation in the lower reaches of the Amu Darya River – current status and suggestions
Irrigated agriculture is widespread in the Central Asian drylands and important for food security of the region. However irrigation practices based on rules made for cotton production on large units do not provide adequate guidance for the now widespread small farms that produce cotton wheat and rice. Excessive unsustainable water use is the consequence. Land and water resource management practices were analysed in 2006 for the irrigated area (approx. 1885 ha) of a water users' association (WUA) as a case study.
Impact of small-scale irrigation on household poverty: empirical evidence from the Ambo district in Ethiopia
A study was conducted in the Ambo district of western Ethiopia in 2006 to understand the poverty reduction impacts of small-scale irrigation development, using the Indris irrigation system as a case study. The study was based on a survey of representative farm households with and without access to irrigation. The total sample size for the study was 222 (107 households with access to irrigation and 115 without). Data were analysed using descriptive statistics, the Foster, Greer and Thobeck poverty indices, and Heckman's selectivity model.
Sanaga discharge at the Edea Catchment outlet (Cameroon): An example of hydrologic responses of a tropical rain-fed river system to changes in precipitation and groundwater inputs and to flow regulation
The Sanaga River is one of Sub-Saharan Africa's largest and greatly regulated rivers. Available flow data for this hydrosystem largely cover the pre- and post-regulation periods. From comparisons between unregulated (hypothetical) and observed scenarios, it has been possible to separate and to quantify hydro-climatic (groundwater + rainfall) change effects from anthropogenic impacts (especially dam-related alterations).
Water management and multiple land use: the dutch approach: competing and complementary functions in water management
Climate change, food crises and deterioration of the environment create immense challenges in water management. In the Netherlands land subsidence, high population density and intensity of land use aggravate these problems. Increased awareness of these problems and civil society's participation in the discussions complicate these challenges. The Netherlands' Government Service for Land and Water Management (DLG), an organisation specialising in integrated land development, has tackled these problems at a regional/local scale.