scholarly journals Evaluation of Irrigation Safety by Operation Management of Water Supply from Large Scale Agricultural Reservoirs

2021 ◽  
Vol 21 (1) ◽  
pp. 189-198
Author(s):  
Minhyuk Jeung ◽  
Jina Beom ◽  
Mu-hong Sung ◽  
Jaenam Lee ◽  
Seung-hwan Yoo ◽  
...  
Keyword(s):  
Large Scale ◽  
Water Shortage ◽  
Storage Management ◽  
Operation Management ◽  
Agricultural Water ◽  
Annual Average ◽  
Recent Climate ◽  
Balance Analysis ◽  
Storage Rate ◽  
Initial Storage

Due to recent climate change, droughts occur frequently, thereby causing a shortage of agricultural water. However, supplies to most agricultural reservoirs have been designed assuming that droughts occur at a frequency of 10 years. Therefore, continuous drought has led to low storage rates. Thus, in this study, a water balance analysis was performed on the Naju reservoir, and the changes in the water shortage according to the minimum storage rate restriction management to cope with drought were evaluated. As a result, a higher management storage rate level results in a higher initial storage rate in the next year, thereby decreasing the annual average shortage. In addition, it shows that a decrease in the frequency of drought and its intensity can be reduced according to the minimum storage management during wet years.

The State of Irrigation Infrastructure in Ghana: The Way Forward

2018 ◽  
Vol 1 (1) ◽  
pp. 54-67
Author(s):  
P. Glitse ◽  
B. V. Nyamadi ◽  
K. W. Darkwah ◽  
K. A. Mintah
Keyword(s):  
Water Management ◽  
Large Scale ◽  
Irrigated Agriculture ◽  
Energy Access ◽  
Agricultural Water ◽  
Agricultural Water Management ◽  
Irrigation Development ◽  
Factors Affecting ◽  
Cost Of Energy ◽  
Irrigation Infrastructure

The Ghana Irrigation Development Authority (GIDA) is a public sector organization established to promote agricultural growth through the provision of irrigation infrastructure and other agricultural water management techniques. Irrigated agriculture in Ghana is categorized into formal, informal or smallholder and large-scale commercial irrigation. Over the years, irrigation development in the country has been faced with a number of challenges, which necessitated the development of the National Irrigation Policy, Strategies and Regulatory Measures and the Ghana Agricultural Water Management Pre-Investment Reform Action Framework. A number of factors affecting irrigation development in the country include lack of capital, commitment by successive governments, cost of energy, access to land and credit, lack of technical know-how and encroachment, among others. Analysis of budget provided by government for public irrigation development was carried out using simple linear regression. Results indicate a bright prospect of irrigation development, with reforms under implementation. A minimum of GHS 633.43 million is required for release into the sub-sector by government together with investments from private sector in the next ten years to shift the balance towards positive growth. To solve the problem of inadequate funding of the sub-sector activities, it is recommended that the GIDA collaborates with Development Partners to fund projects and activities in line with their objectives. GIDA should develop effective programmes for building capacity of contractors involved in development of infrastructure. GIDA should deepen its collaboration with private investors under PPPs and convert electric and diesel/petrol powered irrigation pumps to solar powered ones.

scholarly journals Evaluation of Water-Storage and Water-Saving Potential for Paddy Fields in Gaoyou, China

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1176 ◽  
Author(s):  
Chuanjuan Wang ◽  
Shaoli Wang ◽  
Haorui Chen ◽  
Jiandong Wang ◽  
Yuan Tao ◽  
...  
Keyword(s):  
Southern China ◽  
Financial Burden ◽  
Water Shortage ◽  
Water Saving ◽  
Paddy Fields ◽  
Balance Model ◽  
Agricultural Water ◽  
Average Water ◽  
Agricultural Water Resources ◽  
Water Fee

In China, the stress on agricultural water resources is becoming increasingly severe. In response, a range of water-saving irrigation (WSI) policies and practices have been promoted to improve irrigation efficiency. In this study, a water-balance model in paddy fields was calibrated and validated using a 2-year field experimental dataset collected from an irrigated area in Gaoyou, China, in 2014–2015. The model was used to assess the effects of WSI practices and provides options for implementing water-price reforms. Results show that paddy fields effectively retain rainfall with utilization rates greater than 70% for both shallow wet irrigation (SWI) and shallow humidity-regulated irrigation (SHRI) scenarios. The estimated average water-saving rates from 1960 to 2015 using SWI and SHRI are 33.7% and 43%, respectively, which represent considerable reductions in water consumption. The benefits of WSI practices combined with water management policies are also evident. For example, conversion of irrigation water to industrial water yields a 3-year average water fee of 205.2 yuan/ha using SWI and 20.6 yuan/ha using SHRI, considerably reducing farmers’ financial burden for agricultural water supplies. In conclusion, we recommend the adoption of SWI and SHRI practices in southern China as a means of partially alleviating China’s water-shortage problem.

scholarly journals ANALISA POTENSI WADUK RUKOH DALAM MEMENUHI KEBUTUHAN AIR DI KABUPATEN PIDIE, INDONESIAANALYSIS OF RUKOH RESERVOIR POTENCY FOR DETERMINING WATER REQUIREMENT IN PIDIE DISTRICT, INDONESIA

Agromet ◽  
2011 ◽  
Vol 25 (1) ◽  
pp. 9
Author(s):  
Siti Nurdhawata ◽  
Bambang Dwi Dasanto
Keyword(s):  
Water Availability ◽  
Water Demand ◽  
Model Calibration ◽  
Water Shortage ◽  
Observation Data ◽  
Domestic Water ◽  
Tank Model ◽  
Irrigation Area ◽  
Excess Water ◽  
Balance Analysis

<em>Generally, reservoir can overcome problem of water availability in particular region. The reservoir collects excess water during rainy season to be used at the time of water shortage during dry season. In Pidie, the largest water sources are from Krueng Baro Geunik and Krueng Tiro. The reservoir is located at Krueng Rukoh with Krueng Tiro as the source of water supply. The reservoir provides water for irrigating and supplying domestic water in Baro (11.950 ha) and Tiro (6.330 ha) areas. There are 13 districts (216718 inhabitants) use the water from this reservoir. Given the population growing at rate of 0.52% then the water demand in the region increases. The aim of study was to estimate the volume of water entering the reservoir using the tank model. Calibration curve between the tank model output and observation data showed good correlation (R<sup>2</sup> = 0.7). The calibrated model was then used to calculate the discharge at Krueng Baro Geunik. A water balance analysis showed that the highest deficit occurred in September and the highest surplus in November. Based on this analysis, the capacity of Krueng Rukoh reservoir is able to fulfill its function assuming the rate of population growth and the irrigation area are constant.</em>

ANALYSIS PERFORMANCE OF LARGE SCALE GRID CONNECTED PV POWER PLANTS IN THE TROPICAL REGION.

2021 ◽  
Vol 10 (1) ◽  
pp. 61-75
Keyword(s):  
Power Plants ◽  
Large Scale ◽  
Solar Power ◽  
International Energy Agency ◽  
Performance Ratio ◽  
Tropical Region ◽  
Annual Average ◽  
Energy Agency ◽  
Final Yield ◽  
Solar Power Plants

The main objective of this research is analysed and compared the performance of two solar power plants to identify the possible operational problems in the tropical region. The grid connected PV power plants considered in the present study, Ten Merina and Senergy, were installed in the region of Thies (Senegal). Solar power plants have the same installed capacity 29.491 MWp. A period of one operation year of the solar power plants is considered, starting from January 2018 to December 2018. The performance parameters developed by the International Energy Agency (IEA) are used to analyse the performances of solar power plants. The results show that the plane of array irradiance at the sites is identical with an annual average of 6.2 kWh/m2/d. The annual average performance ratio and final yield of solar power plants are respectively 74.3 %; 4.61 kWh/kWp to Ten Merina and 75.9 %; 4.66 kWh/kWp to Senergy. These results are compared to other solar power plants installed in different locations around the world.

Integration of agri-aqua systems - the Israeli experience.

2020 ◽  
Author(s):  
Sagiv Kolkovski ◽  
Gideon Hulata
Keyword(s):  
Large Scale ◽  
Farming Systems ◽  
Water Shortage ◽  
Fish Ponds ◽  
Agricultural Crops ◽  
Integrated Farming ◽  
Climatic Constraints ◽  
Integrated Farming Systems ◽  
Israeli Experience ◽  
Semi Arid

Abstract Israel is located in the Middle East between Africa, Asia and Europe. Like many semi-arid countries, it faces a water shortage due to limited rainfall and freshwater sources. However, in spite of climatic constraints and overall shortage of water, both agriculture and aquaculture are highly developed. Different methods and solutions to maximize water use were developed to deal with the impediments of water and weather. Agriculture is largely intensive and dependent on irrigation from reservoirs during the dry summer. These irrigation reservoirs are also used for fish culture, in integrated farming systems. Large-scale recirculation systems are in use in which water from fish ponds, and/or tanks in greenhouses or outdoors, is passed through large sediment ponds and water treatment systems before returning to the culture systems. A combination of irrigation reservoirs and fishponds/tanks is also used. Other combinations of fishponds and agricultural crops are also trialed and in use.

scholarly journals Charged Particle (Negative Ion)-Based Cloud Seeding and Rain Enhancement Trial Design and Implementation

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1644
Author(s):  
Wei Zheng ◽  
Fengming Xue ◽  
Ming Zhang ◽  
Qiqi Wu ◽  
Zhou Yang ◽  
...  
Keyword(s):  
Large Scale ◽  
Evaluation Method ◽  
Water Shortage ◽  
Northwest China ◽  
Negative Ion ◽  
Cloud Seeding ◽  
Weather Modification ◽  
Solid Carbon Dioxide ◽  
Design And Implementation ◽  
Hygroscopic Salts

China has been suffering from water shortage for a long time. Weather modification and rainfall enhancement via cloud seeding has been proved to be effective to alleviate the problem. Current cloud seeding methods mostly rely on solid carbon dioxide and chemicals such as silver iodide and hygroscopic salts, which may have negative impacts on the environment and are expensive to operate. Lab experiments have proved the efficiency of ion-based cloud seeding compared with traditional methods. Moreover, it is also more environmentally friendly and more economical to operate at a large scale. Thus, it is necessary to carry out a field experiment to further investigate the characteristics and feasibility of the method. This paper provides the design and implementation of the ion-based cloud seeding and rain enhancement trial currently running in Northwest China. It introduces the basic principle of the trial and the devices developed for it, as well as the installation of the bases and the evaluation method design for the trial.

scholarly journals FastMM: an efficient toolbox for personalized constraint-based metabolic modeling

2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Gong-Hua Li ◽  
Shaoxing Dai ◽  
Feifei Han ◽  
Wenxing Li ◽  
Jingfei Huang ◽  
...  
Keyword(s):  
Flux Balance Analysis ◽  
Large Scale ◽  
Computing Time ◽  
Metabolic Modeling ◽  
The Cancer Genome Atlas ◽  
Flux Balance ◽  
Mcmc Sampling ◽  
Genome Wide ◽  
Balance Analysis ◽  
User Friendly

Abstract Background Constraint-based metabolic modeling has been applied to understand metabolism related disease mechanisms, to predict potential new drug targets and anti-metabolites, and to identify biomarkers of complex diseases. Although the state-of-art modeling toolbox, COBRA 3.0, is powerful, it requires substantial computing time conducting flux balance analysis, knockout analysis, and Markov Chain Monte Carlo (MCMC) sampling, which may limit its application in large scale genome-wide analysis. Results Here, we rewrote the underlying code of COBRA 3.0 using C/C++, and developed a toolbox, termed FastMM, to effectively conduct constraint-based metabolic modeling. The results showed that FastMM is 2~400 times faster than COBRA 3.0 in performing flux balance analysis and knockout analysis and returns consistent outputs. When applied to MCMC sampling, FastMM is 8 times faster than COBRA 3.0. FastMM is also faster than some efficient metabolic modeling applications, such as Cobrapy and Fast-SL. In addition, we developed a Matlab/Octave interface for fast metabolic modeling. This interface was fully compatible with COBRA 3.0, enabling users to easily perform complex applications for metabolic modeling. For example, users who do not have deep constraint-based metabolic model knowledge can just type one command in Matlab/Octave to perform personalized metabolic modeling. Users can also use the advance and multiple threading parameters for complex metabolic modeling. Thus, we provided an efficient and user-friendly solution to perform large scale genome-wide metabolic modeling. For example, FastMM can be applied to the modeling of individual cancer metabolic profiles of hundreds to thousands of samples in the Cancer Genome Atlas (TCGA). Conclusion FastMM is an efficient and user-friendly toolbox for large-scale personalized constraint-based metabolic modeling. It can serve as a complementary and invaluable improvement to the existing functionalities in COBRA 3.0. FastMM is under GPL license and can be freely available at GitHub site: https://github.com/GonghuaLi/FastMM.

Transferring Simulation of Pollutants in YinLuan River Open Channel under Traffic Accidents

2013 ◽  
Vol 385-386 ◽  
pp. 429-432 ◽  
Author(s):  
Chun Xue Zhang ◽  
Li Lin Wang ◽  
Chao Wang ◽  
Shu Yi Yang ◽  
Xue Yi You
Keyword(s):  
Water Supply ◽  
Large Scale ◽  
Traffic Accidents ◽  
Open Channel ◽  
Water Shortage ◽  
Scientific Basis ◽  
Decision Makers ◽  
Water Diversion ◽  
Tianjin City ◽  
Efdc Model

The water diversion project from Luanhe River to Tianjin is a large-scale project, which solved the water shortage of Tianjin city. Because the long water supply open channel along highroads, the traffic emergent incidents bring great potential dangers to the water supply of Tianjin. In this paper, the prediction model of traffic emergent incidents in YinLuan River Open Channel was built and the transferring of pollutants under typical scenes was simulated by EFDC model. The evolution and affective area of pollutant in open channel was obtained. The results provide a scientific basis for the decision makers to take effective measures.

Sign in / Sign up

Export Citation Format

Share Document