Deriving Reservoir Cascade Operation Rules for Variable Streamflows by Optimizing Hydropower Generation and Irrigation Water Delivery

2021 ◽  
Vol 147 (7) ◽  
Author(s):  
Thushara De Silva Manikkuwahandi ◽  
George M. Hornberger
Keyword(s):  
Irrigation Water ◽  
Water Delivery ◽  
Hydropower Generation ◽  
Operation Rules

scholarly journals Efisiensi Penyaluran Air Irigasi BKA Kn 16 Lam Raya Daerah Irigasi Krueng Aceh

2015 ◽  
Vol 8 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Andriani Asarah Bancin ◽  
Dewi Sri Jayanti ◽  
T. Ferijal
Keyword(s):  
Water Resources ◽  
Water Loss ◽  
Irrigation Water ◽  
Water Delivery ◽  
Surface Irrigation ◽  
Secondary Channel ◽  
Irrigation Network ◽  
Irrigation Area ◽  
Average Water ◽  
Delivery Efficiency

Abstrak. Daerah Aliran Sungai (DAS) Krueng Aceh memiliki jaringan irigasi permukaan teknis untuk mengairi 7.450 ha lahan sawah di Kabupaten Aceh Besar. Peningkatan tekanan pada sumber daya air yang tersedia untuk irigasi dan kebutuhan lainnya, terutama selama musim kemarau, membutuhkan jaringan irigasi yang memiliki efisiensi yang tinggi untuk menyalirkan air irigasi. Penelitian ini bertujuan untuk mengetahui efisiensi penyaluran dan jumlah kehilangan air di saluran sekunder dan tersier dari jaringan irigasi pilihan yaitu Jaringan Lam Raya.Hasil penelitian menunjukkan bahwa efisiensi penyaluran rata-rata untuk BKA Kn 16 Lam Raya adalah 52,47%. Rata-rata kehilangan air dan efesiensi penyaluran air di saluran sekunder berturut-turut adalah 0.048 m3/dtk dan 81,11%. Kehilangan tersebut disebabkan oleh penguapan 2,73 x 10-7 m3/dtk, rembesan 0,00212 m3/dtk dan faktor lainnya 0,04548 m3/dtk. Kehilangan air rata-rata di saluran tersier adalah 0.01 m3/dtk yang merupakan kehilangan akibat adanya penguapan 5,046 x 10-8 m3/dtk, rembesan 0,00033m3/dtk dan faktor lainnya 0,00994 m3/dtk. Hal tersebut menyebabkan efisiensi penyaluran air di saluran tersier sekitar 71,88%. Namun, kinerja jaringan irigasi masih dikategorikan baik karena memiliki efisiensi penyaluran air yang lebih besar dari 60%. Kehilangan air di saluran tersier sebagian besar disebabkan oleh banyak bagian dinding dan dasar saluran yang rusak, dan adanya vegetasi dan sedimen pada saluran yang memperlambat aliran air. Conveyance Efficiency Of Irrigation Water At BKA Kn 16 Lam Raya Krueng Aceh Irrigation Area Abstract. Krueng Aceh Watershed has technical surface irrigation network to irrigate 7.450 ha of paddy fields in Aceh Besar District. Increasing pressure on available water resources for irrigation and other needs, particularly during dry season, requires an irrigation network having a higher level of efficiency to deliver irrigation water. This study aims to determine the delivery efficiencies and amount of water loss in secondary and tertiary channels of selected irrigation network. Lam Raya network was selected for the study area. Results showed that average delivery efficiency for BKA Kn 16 Lam Raya was 52.47%. The average water loss and water delivery efficiency in secondary channel were 0,048 and 81,11%, respectively. The loss was caused by evaporation 2.73 x 10-7 m3/s, seepage 0.00212 m3/s and other factors 0.04548 m3/s. The average water loss in tertiary channels was 0,01 m3/s contributed by losses from evaporation 5.046 x 10-8 m3/s, seepage 0.00033 m3/s and other factors 0.00994 m3/s. It caused tertiary channel's water delivery efficiency was approximately 71,88%. However, performance of irrigation network was classified as good since it has water delivery efficiency greater than 60%.  Water loss in tertiary channel largely due to many parts of wall and base of the channels were broken, and the presence of vegetation and sediment in the channel slowed the water flow.

Irrigation Water Delivery Performance

1984 ◽  
Vol 110 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Albert J. Clemmens ◽  
Allen R. Dedrick
Keyword(s):  
Irrigation Water ◽  
Water Delivery ◽  
Delivery Performance

Future opportunities and risks in managing the Eastern Nile water-energy-food-environment nexus

2021 ◽  
Author(s):  
Mikiyas Etichia ◽  
Jose Gutierrez ◽  
Mohammed Basheer ◽  
Eduardo Martinez ◽  
Mathaios Panteli ◽  
...  
Keyword(s):  
Power System ◽  
Open Source ◽  
Water Consumption ◽  
Irrigation Water ◽  
Food Environment ◽  
System Model ◽  
Integrated Modelling ◽  
Nile Basin ◽  
Hydropower Generation ◽  
Resource System

<p>The interlinkages between the water, energy, food, and environment systems of the Eastern Nile Basin are becoming stronger due to an increase in the demand for water, energy, and food and two of the largest multi-year storage dams in the world (i.e., High Aswan Dam and Grand Ethiopian Renaissance Dam (GERD)). Significant benefits can be attained if these resource systems are managed in an integrated manner, which would result in improved efficiencies and reduced trade-offs in resource use, and better and more sustainable solutions to future water-energy-food-environment nexus problems. The ongoing construction of the GERD, the largest hydropower plant in Africa, reveals opportunities and challenges in managing the resource nexus of the Eastern Nile Basin. This study integrates an Eastern Nile river system model with a power system model comprising the Eastern portion of the East African Power Pool (i.e., Ethiopia, Sudan, Egypt, Djibouti, and Libya) to investigate how GERD influences the integrated resources of the Eastern Nile Basin countries. The system is modelled using an open-source water resource system simulator (Pywr) and an open-source Python power system simulator. The two simulators are linked using an open-source agent-based model integration framework (Pynsim). Based on existing and plausible future states of the system, three scenarios are formulated and examined: (1) a baseline scenario representing the existing system before GERD, (2) GERD added to the system, including the initial filling and long-term operation phases of the dam, and (3) increased irrigation water abstractions in Ethiopia and Sudan with GERD. Results show that GERD operation reduces (i) electricity curtailments in Ethiopia and Sudan, (ii) irrigation water deficits in Sudan, (iii) Sudan’s greenhouse gas emissions, and (iv) hydropower generation and irrigated water consumption in Egypt. Increasing irrigation water abstraction in Ethiopia and Sudan reduces hydropower generation basin-wide and irrigation water consumption in Egypt. This study demonstrates the benefits of an integrated modelling approach for exploring water-energy-food-environment nexus inter-connections in the Eastern Nile multi-resource system.</p>

scholarly journals Comparison of Optimal Hedging Policies for Hydropower Reservoir System Operation

Water ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 121 ◽  
Author(s):  
Aida Tayebiyan ◽  
Thamer Ahmad Mohammad ◽  
Nadhir Al-Ansari ◽  
Mohammad Malakootian
Keyword(s):  
Power Generation ◽  
Reservoir Operation ◽  
Water Storage ◽  
Optimal Decision ◽  
Hydropower Generation ◽  
Mean Power ◽  
Reservoir System ◽  
Operation Rules ◽  
Significant Difference ◽  
Hydropower Reservoir

Reservoir operation rules play an important role in regions economic development. Meanwhile, hedging policies are mostly applied for municipal, industrial, and irrigation water supplies from reservoirs and it is less used for reservoir operation for hydropower generation. The concept of hedging and rationing factors can be used to maintain the water in a reservoir for the sake of increasing water storage and water head for future use. However, water storage and head are the key factors in operation of reservoir systems for hydropower generation. This study investigates the applicability of seven competing hedging policies including four customary forms of hedging (1PHP, 2PHP, 3PHP, DHP) and three new forms of hedging rules (SOPHP, BSOPHP, SHPHP) for reservoir operation for hydropower generation. The models were constructed in MATLAB R2011b based on the characteristics of the Batang Padang hydropower reservoir system, Malaysia. In order to maximize the output of power generation in operational periods (2003–2009), three optimization algorithms namely particle swarm optimization (PSO), genetic algorithm (GA), and hybrid PSO-GA were linked to one of the constructed model (1PHP as a test) to find the most effective algorithm. Since the results demonstrated the superiority of the hybrid PSO-GA algorithm compared to either PSO or GA, the hybrid PSO-GA were linked to each constructed model in order to find the optimal decision variables of each model. The proposed methodology was validated using monthly data from 2010–2012. The results showed that there are no significant difference between the output of monthly mean power generation during 2003–2009 and 2010–2012.The results declared that by applying the proposed policies, the output of power generation could increase by 13% with respect to the historical management. Moreover, the discrepancies between mean power generations from highest to lowest months were reduced from 49 MW to 26 MW, which is almost half. This means that hedging policies could efficiently distribute the water-supply and power-supply in the operational period and increase the stability of the system. Among the studied hedging policies, SHPHP is the most convenient policy for hydropower reservoir operation and gave the best result.

Structure Design and Mechanics Calculation of Aqueduct Model

2014 ◽  
Vol 488-489 ◽  
pp. 381-384
Author(s):  
Xue Chen Li ◽  
Peng Chen ◽  
Yong Ye ◽  
Cheng Hao Wang
Keyword(s):  
Mechanical Properties ◽  
Irrigation Water ◽  
Static Load ◽  
Water System ◽  
Structure Design ◽  
Structure Calculation ◽  
Continuous Beam ◽  
Water Delivery ◽  
Practical Application ◽  
Whole Process

Aqueduct is a conveyance structure which can across the channel, depressions, roads and railways and its conveyance water system is mainly composed of bridges, tunnels or ditch. Aqueduct is widely used in hydraulic engineering, and plays a role in irrigation ,water delivery , drainage and desilting. A large aqueduct can also be used for navigation. In the paper, based on the aqueduct design, aqueduct model making, aqueduct structure calculation and static load experiment, the whole process of design and calculation of continuous beam truss aqueduct model are performed, and the analysis of its mechanical properties are also carried on. These results are useful for the practical application of aqueduct structure.

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