Irrigation Articles
-
LCA of integrated orange production in the Comunidad Valenciana (Spain)
In order to perform an LCA of integrated orange production in the Comunidad Valenciana two representative areas were studied. The functional unit was 1 kg oranges at the farm gate. Eight scenarios were considered according to type of irrigation, the origin of water and the tillage practice. The production of agrochemicals, the production and use of energy in agriculture (for irrigation and ...
-
Disposal of De-Icing Effluents By Irrigation
At Zurich Airport (Switzerland) alcohols, as well as urea in small quantities, are utilized for de-icing in order to maintain the air traffic during winter. To purify the accumulated de-icing effluents a new, groundbreaking, cost-effective (investment and maintenance) method was developed which has been successfully applied since winter 2000/2001. The de-icing effluents are irrigated onto the ...
-
Minimal models and agroecological policy at the regional scale: An application to salinity problems in southeastern Australia
A minimal dynamical systems model that couples agricultural activity, native vegetation, and hydrological processes is developed to explore policy options regarding regional-scale soil and water salinization in southeastern Australia. The analysis suggests that although considerable revegetation is required to restore catchment water balance, the current value of water in uses other than ...
-
The effects of surface water abstraction for rice irrigation on floodplain fish production in Bangladesh
Abstraction of surface water for irrigation poses a serious threat to the sustainability of floodplain fisheries in Bangladesh. Previous fisheries research has accorded a central role to dry-season (Rabi) water maintenance in safeguarding the health of the fishery, but rice irrigation water abstraction dries up water bodies at a rapid rate. Having reviewed various aspects of this water ...
-
Rethinking food production for a world of eight billion
The World Food Programme and the Chinese government jointlyannounced that food aid shipments to China would stop at the end of theyear. For a country where a generation ago hundreds of millions of peoplewere chronically hungry, this was a landmark achievement. Not only hasChina ended its dependence on food aid, but almost overnight it has becomethe world’s third largest food aid donor. The key ...
-
Quantification of soil surface evaporation under micro-scale advection in drip-irrigated fields
The objective of this study is to quantify soil surface evaporation under micro-scale advection in drip-irrigated fields. A numerical model for estimating soil surface evaporation under micro-scale advection, assuming drip-irrigated fields, is introduced. Results indicate that the soil surface evaporation changes spatially. Soil surface evaporation at the upwind edge of wet soil portions adjacent ...
-
Regional Assessment of Nutrient and Pesticide Leaching in the Vegetable Production Area of Rattaphum Catchment, Thailand
Regional groundwater vulnerability maps to indicate the impact of leaching of chemicals under different management scenarios were prepared for the Rattaphum Catchment using several leaching models and GIS techniques. The Attenuation Factor (AF) model was used to simulate the leaching potential of several pesticides for selected soils in the catchment under different rates of recharge from ...
-
Water institutional reforms in Sri Lanka
ABSTRACT This paper reviews water institutional reforms in Sri Lanka by contrasting those observed during the 1980s with those proposed during the 1990s. While the earlier reforms focused on the irrigation sector that yielded quicker benefits and low political risks, recent reforms have covered macro institutions and the whole water sector where the benefits are gradual and less visible but with ...
-
Water efficiency of agricultural production in China: regional comparison from 1999 to 2002
We apply stochastic frontier analysis (SFA) techniques to a provincial level data set to measure technical and water efficiency in China's agricultural production from 1999 to 2002. The determinants of the efficiencies are identified together with the physical determinant structure of the irrigation factor, which refers to the water use per irrigated land area. The study yields the following ...
-
Impacts of elemental S applied under various temperature and moisture regimes on pH and available P in acidic, neutral and alkaline soils
We evaluated the effect of elemental S (S0) under three moisture (40, 60, 120% water-filled pore space, WFPS) and three temperature regimes (12, 24, 36°C) on changes in pH and available P (0.5 N NaHCO3-extractable P) concentrations in acidic (pH 4.9), neutral (pH 7.1) and alkaline (pH 10.2) soils. Repacked soil cores were incubated for 0, 14, 28 and 42 days. Application of S0 did not alter the ...
-
Regional Assessment of Nutrient and Pesticide Leaching in the Vegetable Production Area of Rattaphum Catchment, Thailand
Regional groundwater vulnerability maps to indicate the impact of leaching of chemicals under different management scenarios were prepared for the Rattaphum Catchment using several leaching models and GIS techniques. The Attenuation Factor (AF) model was used to simulate the leaching potential of several pesticides for selected soils in the catchment under different rates of recharge from ...
-
Group method of data handling (GMDH) application for modelling of mechanical properties of trees irrigated with wastewater
Experiments have been carried out to identify the mechanical properties of trees irrigated with wastewater, as well as mathematical modelling of measurement results via the group method of data handling (GMDH) method. Eucalyptus trees were cultivated and irrigated with processed wastewater from a treatment plant. Characteristics of wood quality (axial compression and bending, etc.) were measured ...
-
Group method of data handling (GMDH) in modelling of growth dynamics of trees irrigated with wastewater
This paper describes the formulation and analysis of growth dynamics models for trees irrigated with wastewater. The models can be used to obtain the characteristics of a species, depending on treatment conditions and climate factors, at all stages of growth. The experiments were carried out at the University of Patras to identify the characteristics (height rate and mortality) of the forest tree ...
-
A technology for the treatment of olive-mill waste water in a continuously fed plant
Abstract A bench-scale pilot plant has been developed for the treatment of olive-mill water. The plant is fed in a continuous mode and implements a primary treatment (sand filtering and irradiation with UV-rays) and a secondary treatment (anoxic and aerobic biological treatment). Satisfactory results were obtained and the treated green water falls under the limits of the Italian legislation. ...
-
A systematic overview of urban agriculture in developing countries from an environmental point of view
Urban agriculture can contribute to food security and poverty alleviation in developing countries. It can also help to improve public health and resource management by reusing excreta, wastewater and organic solid waste. This paper presents a systematic overview of urban agriculture in low and middle-income countries and identifies research needs. The cross-cutting issues, especially between ...
-
Arundo Donax Removal in the Santa Ana River Watershed
Orange County Water District (OCWD) was awarded the Ruth Anderson Wilson Award by the Santa Ana Watershed Project Authority for its collaborative efforts in a program to remove Arundo donax (arundo) from the Santa Ana River watershed. The arundo removal program is also one reason the U.S. Environmental Protection Agency selected OCWD as a Clean Water Partner for 2003. Arundo donax, or the giant ...
-
A time domain transmission sensor with TDR performance characteristics
Abstract Time domain reflectometry (TDR) has become a standard method for determining water content in soils and porous media. However, the cost of instrumentation and the level of user ability required often limit its application, especially for agricultural and urban soil water management. The objective of this paper is to report on a new, lower cost time domain transmission (TDT) sensor and to ...
-
National Management Measures to Control Nonpoint Source Pollution from Agricultures
National Management Measures to Control Nonpoint Source Pollution from Agriculture is a technical guidance and reference document for use by State, local, and tribal managers in the implementation of nonpoint source pollution management programs. It contains information on the best available, economically achievable means of reducing pollution of surface and ground water from agriculture (Final ...
-
Omaha beach golf course
The rich green swathes of the new extension of Omaha Golf Course are visual proof of high technol¬ogy at its best, enabling lush ungated grass to survive all year round despite being bordered on two sides by ocean and estuary and buitt on a combination of sand dunes and wetlands. It is a world first, and an international success story for the three main players - local drainlayer Ivor Jones, ...
-
China: The South-North Water Transfer Project-is it justified?
The South–North Water Transfer Project (SNWTP), if fully developed, could divert 40–50 km3/yr from the Yangtse basin to the North China plain, alleviating water scarcity for 300–325M people living in what even then will be a highly water-stressed region. Construction of the next stage, diverting up to 20 km3 at a cost of about $17,000M (including $7000M in ancillary costs), is to start in ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you