Results 181 to 190 of about 2,316 (222)

Substantiation of the parameters of temporary irrigation ditch leveler tools

Russian Agricultural Sciences, 2014
It is established that the process of moving and placing dry upper soil layers and wet layers from the base of a bank in the channel of a temporary irrigation ditch is affected by the shape of the leveler mold-boards, clearance between them, and moldboard height and angle. The parameters of the leveler tool are calculated.
N. T. Manabaev, U. A. Usipbaev, Z. A. Balabekov, A. A. Meirbekov, T. K. Samataev   +4 more
openaire   +1 more source

optimizing Temporal Water Allocation by Irrigation Ditch Companies

Transactions of the ASAE, 1987
ABSTRACT Adynamic programming (DP) algorithm is presented for allocation of irrigation water over time by ditch companies. The algorithm optimizes weekly deliveries of water to farmers and uses a single state variable, total storage in reservoirs at the beginning of each week.
null Jim C. Loftis, null Robert J. Houghtalen   +1 more
openaire   +1 more source

An Open Ditch Surge Flow Furrow Irrigation System

Applied Engineering in Agriculture, 1986
AN automated rotating gate enabled an existing open channel furrow irrigation system to be adapted to surge flow. Equipment performance was quite reliable. System hydraulics were analyzed with respect to unequal outlet elevations, spatially varied flow within an irrigation bay, and unsteady flow due to the opening or closing of the automated gate ...
null Roberto Testezlaf, null James E. Garton, null Anthony J. Cudrak, null Ronald L. Elliott   +3 more
openaire   +1 more source

Mitigation Assessment of Vegetated Drainage Ditches for Collecting Irrigation Runoff in California

Journal of Environmental Quality, 2008
AbstractWidespread contamination of California water bodies by the organophosphate insecticides diazinon and chlorpyrifos is well documented. While their usage has decreased over the last few years, a concomitant increase in pyrethroid usage (e.g., permethrin) (replacement insecticides) has occurred.
M T, Moore, D L, Denton, C M, Cooper, J, Wrysinski, J L, Miller, K, Reece, D, Crane, P, Robins   +7 more
openaire   +2 more sources

Plant diversity in a water-meadow landscape: the role of irrigation ditches

Plant Ecology, 2017
Species-rich, extensively managed grasslands are among the most threatened ecosystems in Europe. The traditional technique of meadow irrigation, formerly practised in large parts of Europe, may be a viable management option that meets both ecological and economical objectives.
Melanie Meier, Rebekka Gerlach, Jens Schirmel, Constanze Buhk   +3 more
openaire   +1 more source

Chemical Characteristics and Its Irrigation Effect of Drainage Water in Ditches, Yinbei Irrigation Districts, Ningxia

9th International Drainage Symposium held jointly with CIGR and CSBE/SCGAB Proceedings, 13-16 June 2010, Québec City Convention Centre, Quebec City, Canada, 2010
Taking five drainage reuse sites in Yinbei irrigation districts, Ningxia for example, this paper analyzed the chemical characteristics of drainage water in ditches, saline-alkaline hazard and its impact of drainage reuse on soil. The result showed that the hydro-chemical type of drainage water is CNa at Nuanquan farm and ClNa at other four pilots ...
null Shaoli Wang, null Xu Di, null Yang Jianguo, null Fang Shuxing   +3 more
openaire   +1 more source

Horizontal distribution of phosphorus in soils of irrigation ditches

Global Journal of Pure and Applied Sciences, 2012
The cultivation of vegetable crops during the dry season is an age-long practice by peasant farmers in northern Nigeria. The water for the irrigation of the plots is supplied by shallow streams, or ponds and wells dug along the banks of the streams. Phosphorus is an important plant nutrient.
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Greenhouse gas emissions from drainage ditches and irrigation canals

Drainage ditches and irrigation canals are widespread across the globe, and have a high potential to emit greenhouse gases (GHG) to the atmosphere, contributing to climate change. Often located in agricultural or urban areas, ditches may receive high inputs of organic matter and nutrients, thereby stimulating GHG production.
Teresa Silverthorn, Chris Evans, Michael Peacock   +2 more
openaire   +1 more source

Ditches across the Desert: Irrigation in the Lower Pecos Valley

The Western Historical Quarterly, 2005
John O. Baxter, Stephen Bogener
  +4 more sources

Smith-Goss ditch irrigation project.

2012
http://archive.org/details ...
openaire   +1 more source