scholarly journals Effect of Water Supply by a Subsurface Irrigation System for Upland Field (OPSIS) on Spinach Growth

2018 ◽  
Vol 17 (4) ◽  
pp. 423-429
Author(s):  
Hidekazu Sasaki ◽  
Megumu Takahashi
Keyword(s):  
Water Supply ◽  
Irrigation System ◽  
Effect Of Water ◽  
Upland Field

The Effect of Water Supply on the Growth of lzmir, Palotina and Amarelinho Tobaccos

1981 ◽  
Vol 11 (2) ◽  
Author(s):  
R. Comber
Keyword(s):  
Water Stress ◽  
Water Supply ◽  
Sand Culture ◽  
Effect Of Water

AbstractThe Oriental tobacco variety Izmir has been grown in sand culture in a greenhouse under various degrees of water stress. Plants given 400 cm

scholarly journals Impacts of Legal and Institutional Changes on Irrigation Management Performance: A Case of the Gezira Irrigation Scheme, Sudan

Water ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1579 ◽  
Author(s):  
Ahmed Elshaikh ◽  
Shi-hong Yang ◽  
Xiyun Jiao ◽  
Mohammed Elbashier
Keyword(s):  
Water Management ◽  
Water Supply ◽  
Irrigation System ◽  
Irrigation Management ◽  
Institutional Arrangements ◽  
Institutional Changes ◽  
Management Performance ◽  
Water Users ◽  
Water Surplus ◽  
The Right

This study aims to offer a comprehensive assessment of the impacts of policies and institutional arrangements on irrigation management performance. The case study, the Gezira Scheme, has witnessed a significant decrease in water management performance during recent decades. This situation led to several institutional changes in order to put the system on the right path. The main organizations involved in water management at the scheme are the Ministry of Irrigation & Water Resources (MOIWR), the Sudan Gezira Board (SGB), and the Water Users Associations (WUAs). Different combinations from these organizations were founded to manage the irrigation system. The evaluation of these organizations is based on the data of water supply and cultivated areas from 1970 to 2015. The measured data were compared with two methods: the empirical water order method (Indent) that considers the design criteria of the scheme, and the Crop Water Requirement (CWR) method. Results show that the MOIWR period was the most efficient era, with an average water surplus of 12% compared with the Indent value, while the most critical period (SGB & WUAs) occurred when the water supply increased by 80%. The other periods of the Irrigation Water Corporation (IWC), (SGB & MOIWR), and (WUAs & MOIWR) had witnessed an increase in water supply by 29%, 63%, and 67% respectively. Through these institutional changes, the percentage of excessive water supply jumped from 12% to 80%. Finally, the study provides general recommendations associated with institutional arrangements and policy adoption to improve irrigation system performance.

scholarly journals Effect of water supply on sugar concentration of carrot

2015 ◽  
Vol 44 (4) ◽  
pp. 617-622
Author(s):  
A. Ombódi ◽  
A. Lugasi ◽  
L. Helyes
Keyword(s):  
Water Supply ◽  
Sugar Concentration ◽  
Effect Of Water

Sustainable Irrigation: Karez System in Afghanistan

2020 ◽  
Vol 6 (2) ◽  
pp. 1-18
Author(s):  
Abdullah Azami ◽  
◽  
Jay Sagin ◽  
Sayed Hashmat Sadat ◽  
Hejratullah Hejran ◽  
...  
Keyword(s):  
Supply Chain ◽  
Water Supply ◽  
Land Surface ◽  
Irrigation System ◽  
Irrigation Scheme ◽  
Irrigation Systems ◽  
Irrigation Methods ◽  
Sustainable Water Supply ◽  
Water Based ◽  
Sustainable Irrigation

In Afghanistan, water is mostly used for agricultural purposes. The water supply chain requires updating to ensure its sustainability. Different irrigation methods – such as surface water based irrigation (via canals), groundwater based irrigation, and the Karez irrigation system – are applied across the country. Considering the compatibility of the Karez system with the environment, it can be deemed the most effective irrigation scheme, as it allows collecting a significant amount of groundwater and conveying it to land surface via sub-horizontal tunnels using gravity. This article analyzes Afghanistan’s Karez irrigation systems currently feeding water to over 170,000 ha of farmland with a potential to expand and become a component of sustainable water supply chain.

Determining parameters and chronology of a sustainable water harvest system in desert oases; case study Qurayyah, northwest Arabian Peninsula

2020 ◽  
Author(s):  
Sabrina Prochazka ◽  
Marta Luciani ◽  
Christopher Lüthgens
Keyword(s):  
Climate Change ◽  
Water Supply ◽  
Reverse Engineering ◽  
Arabian Peninsula ◽  
Irrigation System ◽  
Climatic Conditions ◽  
Water Supply Systems ◽  
Water Harvesting ◽  
The Holocene ◽  
Engineering Approach

<p>The arid regions of the world occupy 46% of the total surface area, providing a habitat for 3 billion people. More than 630 million people are directly affected by desertification. Extreme events like droughts and flash floods increase the pressure on plants, animals and above all, humans and their settlements. In the context of a climate change with such far-reaching consequences, historical oases settlements stand out as best practice examples, because their water supply systems must have been adapted to the changing climate during the Holocene to guarantee the viability of the oases and their inhabitants. I will focus on the ancient oasis Qurayyah, located in the northwest of the Arabian Peninsula, a unique example in this context. Recent research has proven that, lacking a groundwater spring, the formation of a permanent settlement in Qurayyah was made possible mainly by surface-water harvesting, with local fracture springs potentially only providing drinking water. First numerical dating results for the water harvesting system from optically stimulated luminescence (OSL) dating of quartz confirm that the system was erected in a period characterized by changing climatic conditions from the Holocene climate optimum to the recent arid phase. This study aims to determine parameters and chronology of this sustainable irrigation system and intends to learn and understand how ancient settlers accomplished the construction of such a highly developed water supply system. To reach this research aim the irrigation system was reconstructed using field mapping and remote sensing techniques. It was shown that the reconstructed irrigation system worked as a flood irrigation system. Dams and channels were built to maximize the flooded area and at the same time to prevent catastrophic flooding under high discharge conditions. Contemporaneous historical irrigation systems in comparable size and complexity are known from Mesopotamia or Egypt. In addition to the system’s reconstruction, a new reverse engineering approach based on palaeobotany was developed for Qurayyah to reconstruct the climate conditions during the time of its operation. Compared to today’s precipitation of 32 mm per year in the research area, our results imply that the irrigation system was constructed in a time of significant climate change, because significantly higher amounts of precipitation would have been necessary to enable the cultivation of olive trees (reference plant for the reverse engineering approach), with a sufficient amount of water.</p>

EFFECT OF WATER SUPPLY ON YIELD CHARACTERISTICS OF PROCESSING CHERRY TOMATO

2014 ◽  
pp. 587-592 ◽  
Author(s):  
P. Szuvandzsiev ◽  
L. Helyes ◽  
A. Neményi ◽  
Z. Pék
Keyword(s):  
Water Supply ◽  
Cherry Tomato ◽  
Effect Of Water
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