Multiple-use management in a large irrigation system: an assessment of technical constraints to integrating aquaculture within irrigation canals

2005 ◽  
Vol 54 (1) ◽  
pp. 31-42 ◽  
Author(s):  
Q. Li ◽  
J. W. Gowing ◽  
C. Mayilswami
Keyword(s):  
Irrigation System ◽  
Multiple Use ◽  
Irrigation Canals ◽  
Multiple Use Management ◽  
Large Irrigation

scholarly journals THE SOVIET AGRARIAN POLICY IN THE IRRIGATION FIELD IN UZBEKISTAN (1950-1990)

2021 ◽  
pp. 21-24
Author(s):  
Oybek Kamilovich Komilov ◽  
Doniyorbek Murodjon ugli Sobirov
Keyword(s):  
Irrigation System ◽  
Irrigation Canals ◽  
Soviet Government ◽  
Historical Material ◽  
Agrarian Policy ◽  
Pumping Stations ◽  
Practical Life ◽  
Large Irrigation

In the article it is analyzed the policy of the centre of the further strengthening mono cultural clap in Uzbekistan that in undertaken measures on building of large irrigation canals and pumping stations in republic on the bases of archival sources and a historical material in 50-80 XX century. Besides, research showed that Soviet government, having outlined the appropriate political and economic goals in Uzbekistan, began to introduce into practical life a policy related to the development of the irrigation system and the construction of reclamation facilities.

scholarly journals Design of Water Distribution System: Appropriateness of Structured System in Large Irrigation Projects in Nepal

2016 ◽  
Vol 19 ◽  
pp. 25-30
Author(s):  
Basistha Adhakari
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Irrigation System ◽  
Command Area ◽  
Irrigation Project ◽  
Irrigation Projects ◽  
Structured System ◽  
Large Irrigation ◽  
Area Development

Many large irrigation projects in Nepal operate under command area development works that emphasize on-farm water distribution and management. These projects have specific design characteristics that were planned to comply with available water resources, climatic conditions, soil type, and water distribution technology. The water distribution technologies differ based on the design needs of each individual project and the design preferences of various foreign consulting firms. This article focuses on the issues of planning and designing water distribution systems of large irrigation systems at the irrigation service delivery level. The layout planning of an irrigation system is an important aspect of design for water distribution, typically guided by hierarchical system. This article also highlights the existing canal hierarchy of these systems and their appropriateness for efficient water distribution. Furthermore, the appropriateness of the structured system is also examined in the Sunsari Morang Irrigation Project. The article concluded with some suggestions for planning and designing command area development works of forthcoming large irrigation projects such as the Sikta Irrigation Project, the Babai Irrigation Project, and the Mahakali Irrigation Project Stage-III.HYDRO Nepal JournalJournal of Water, Energy and EnvironmentIssue: 19Page: 25-30

scholarly journals Generalizing Fuzzy SARSA Learning for Real-Time Operation of Irrigation Canals

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2407
Author(s):  
Kazem Shahverdi ◽  
J. M. Maestre ◽  
Farinaz Alamiyan-Harandi ◽  
Xin Tian
Keyword(s):  
Performance Indicators ◽  
Action Learning ◽  
Irrigation Canals ◽  
State Action ◽  
Time Operation ◽  
Real Time Operation ◽  
Southwest Of Iran ◽  
Large Irrigation ◽  
Q Function ◽  
Reinforcement Learning Model

Recently, a continuous reinforcement learning model called fuzzy SARSA (state, action, reward, state, action) learning (FSL) was proposed for irrigation canals. The main problem related to FSL is its convergence and generalization in environments with many variables such as large irrigation canals and situations beyond training. Furthermore, due to its architecture, FSL may require high computation demands during its learning process. To deal with these issues, this work proposes a computationally lighter generalizing learned Q-function (GLQ) model, which benefits from the FSL-learned Q-function, to provide operators with a faster and simpler mechanism to obtain operational instructions. The proposed approach is tested for different water requests in the East Aghili Canal, located in the southwest of Iran. Several performance indicators are used for evaluating the GLQ model results, showing convergence in all the investigated cases and the ability to estimate operational instructions (actions) in situations beyond training, delivering water with high accuracy regarding several performance indicators. Hence, the use of the GLQ model is recommended for determining the operational patterns in irrigation canals.

Environment and Population: The Collapse of Large Irrigation Systems Reconsidered

2004 ◽  
Vol 46 (3) ◽  
pp. 451-468 ◽  
Author(s):  
Stuart J. Borsch
Keyword(s):  
Global Warming ◽  
Irrigation System ◽  
Modern World ◽  
Agricultural Systems ◽  
Irrigation Systems ◽  
Great Abundance ◽  
Agricultural Revolution ◽  
Large Irrigation ◽  
Dry Farming

Irrigation systems were the first source of great abundance that stemmed from the Agricultural Revolution. They were also humanity's first great environmental curse. Long before issues of global warming and freshwater shortages haunted the modern world, irrigation systems blessed and bedeviled humans with their promise and peril. While a well-ordered functional irrigation system provided inhabitants with seed-to-yield ratios that were the envy of any dry-farming regime, these same irrigation systems could collapse in toto, bringing disaster on a scale never seen in rain-fed agricultural systems.

Are community forestry principles at work in Ontario’s County, Municipal, and Conservation Authority forests?

2012 ◽  
Vol 88 (06) ◽  
pp. 697-707 ◽  
Author(s):  
Sara Teitelbaum ◽  
Ryan Bullock
Keyword(s):  
Community Forestry ◽  
Local Governance ◽  
Multiple Use ◽  
Community Forests ◽  
Governance Process ◽  
Unique Approach ◽  
Multiple Use Management ◽  
Forest Use ◽  
Local Government Management ◽  
Land Community

Ontario’s County, Municipal and Conservation Authority forests have received little attention within the academic literature on community forestry in Canada. These “Agreement Forests”, as they were once called, are a product of the early 20th century and have been under local government management since the 1990s. Most are situated in Southern Ontario. In this article we investigate the extent to which community forestry principles are at work in these forests. Three principles— participatory governance, local benefits and multiple forest use—are analyzed using a composite score approach derived from survey data collected from nearly all of these forest organizations (response rate = 80%). Results indicate that most of these organizations do display attributes associated with community forestry principles, including a local governance process, public participation activities, local employment and multiple-use management. Traditional forestry employment is less strong than in similar studies of Crown land community forests; however, there is an important emphasis on non-timber activities. The article concludes that the County, Municipal and Conservation Authority forests represents a unique approach, which reflects the specific geographic and socio-economic context in which it resides.

Use of polyvinyl chloride liners for large irrigation canals in Alberta

1987 ◽  
Vol 24 (2) ◽  
pp. 252-259 ◽  
Author(s):  
N. F. Weimer
Keyword(s):  
Polyvinyl Chloride ◽  
Control Program ◽  
Extensive Study ◽  
Irrigation Canals ◽  
Quality Control Program ◽  
Southern Alberta ◽  
Canal Systems ◽  
The Government ◽  
Large Irrigation ◽  
Cover Material

In 1982, the Government of Alberta began a program to rehabilitate and expand existing irrigation headworks systems within southern Alberta. Particular emphasis was placed on effectively minimizing future seepage from these canal systems. To fulfill this requirement, Alberta Environment undertook an extensive study of methods of seepage control that would be most appropriate for use in this program. The study concluded that the installation of a complete canal buried membrane lining was one of the most effective methods for controlling seepage. The geomembrane material selected for use as the buried liner for this installation was 0.5 mm (20 mil) thick polyvinyl chloride (PVC). This paper presents the basis on which the complete canal buried membrane lining system was selected, the reasons for selecting the 0.5 mm (20 mil) thick PVC as the lining material, the quality control program for monitoring the purchasing of the PVC material, and the installation procedures used for placing the membrane within the canal cross section. The design criteria and construction procedures relevant to the earth cover material being placed on the membrane liner are also presented. Key words: irrigation, canals, seepage, lining, geomembrane, performance.

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