Evaluation and modification of some empirical and semi-empirical approaches for prediction of area-storage capacity curves in reservoirs of dams

Issa, Issa E.; Al‐Ansari, Nadhir; Sherwany, Govand; Knutsson, Sven

doi:10.1016/j.ijsrc.2015.12.001

Cited by 16 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Permasalahan sedimentasi merupakan masalah yang sangat penting untuk segera ditangani di suatu waduk [9]. Sedimentasi dapat mengurangi kapasitas tampungan suatu waduk [10], [11] dan memengaruhi kondisi kualitas air [12], [13]. Sedimentasi mempunyai hubungan dengan tingkat kekeruhan dan kedalaman perairan [14], [15].…”

Section: Pendahuluanunclassified

Analisis Dinamika Tingkat Kekeruhan Dan Kedalaman Relatif Perairan Di Waduk Sutami Kabupaten Malang

Rusydi

Masitoh²

2021

jfmr

View full text Add to dashboard Cite

Penurunan fungsi waduk Sutami yang berupa sedimentasi intensif dalam kurun waktu 2013-2019 perlu dilakukan upaya identifikasi dan monitoring. Upaya ini dilakukan dengan memanfaatkan teknologi penginderaan jauh yang bertujuan untuk menganalisis dinamika sedimentasi perairan berdasarkan kedalaman relatif air dan tingkat kekeruhan air di waduk Sutami pada musim kemarau tahun 2013-2019. Citra satelit Landsat 8 OLI diolah untuk mendapat nilai Relative Water Depth (RWD) dan Normalized Difference Turbidity Index (NDTI). Hasil penelitian menunjukkan bahwa pada tahun 2013 hingga tahun 2019, kenampakan air keruh cenderung teridentifikasi di bagian timur waduk yang juga merupakan inlet waduk Sutami. Analisis kedalaman relatif air dilakukan untuk mengetahui dampak sedimentasi terhadap perubahan kedalaman perairan. Tingkat kekeruhan dan kedalaman relatif perairan tidak berhubungan langsung yang kuat secara statistik. Semakin keruh suatu perairan, maka belum tentu kedalaman relatif pada perairan tersebut menjadi semakin dangkal. Proses sedimentasi perairan di waduk Sutami yang terjadi pada tahun 2013-2019 menunjukkan bahwa proses tersebut dipengaruhi oleh tingkat kekeruhan.

show abstract

Section: Pendahuluanunclassified

Analisis Dinamika Tingkat Kekeruhan Dan Kedalaman Relatif Perairan Di Waduk Sutami Kabupaten Malang

Rusydi

Masitoh²

2021

jfmr

View full text Add to dashboard Cite

show abstract

“…The above‐specified form of E is obtained as follows. Firstly, empirical models suggest that it is often reasonable to consider that the surface water area of the reservoir when the water volume equals v is proportional to v 2/3 . If the evaporation from the water surface and/or direct rainfall to the water surface are considered in the water balance dynamics, their influence is proportional to the surface water area and thus to v 2/3 .…”

Section: Numerical Analysismentioning

confidence: 99%

Modeling stochastic operation of reservoir under ambiguity with an emphasis on river management

Yoshioka

2019

Optim Control Appl Methods

View full text Add to dashboard Cite

An optimization problem of controlling a dam installed in a river is analyzed based on a stochastic control formalism of a diffusion process under model ambiguity: a new mathematical approach to this issue. The diffusion process is a pathwise unique solution to a water balance equation considering the inflow, outflow, water loss in the reservoir, and direct rainfall. Finding the optimal reservoir operation policy reduces to solving a degenerate parabolic partial differential equation: a Hamilton-Jacobi-Bellman-Isaacs equation. A monotone finite difference scheme is constructed for discretization of the equation, successfully generating nonoscillatory and reasonably accurate numerical solutions. Stability analysis of the resulting water balance dynamics is finally carried out for both environmentally friendly and not friendly reservoir operations. KEYWORDS finite difference scheme, Hamilton-Jacobi-Bellman-Isaacs equation, reservoir operation, stochastic control, viscosity solution INTRODUCTIONThis paper contributes to providing a mathematical framework for modeling and control of reservoirs created in rivers.Since the problem has an engineering background, it is first presented, and then, the issues to be addressed and our contributions are explained.Many rivers have dams serving as central infrastructures to supply essential water resources for human lives. 1-3 The stored water in the reservoir created by a dam is utilized for multiple purposes, such as drinking water, irrigation, and hydropower generation. 4 Several dams are used for flood mitigation as well. 5,6 On the other hand, controlling a dam critically affects its downstream river environment because the original flow regime is altered. 7-9 Sediment transport and attached algae population dynamics in dam downstream experience significant changes because dams trap sediment and the algae growth is highly flow-dependent. 10 Dam operation is thus desired to be environmentally friendly such that its impacts on the downstream are minimized, while it should be fit-for-purpose at the same time.Management of environment and ecology in rivers has been a long-standing engineering problem, 11-13 and mathematical tools and concepts for their modeling, analysis, and control are still developing. Several researchers considered river management problems based on stochastic process models such as stochastic differential equations (SDEs) 14 that can naturally consider stochasticity involved in environmental and ecological processes. 15 Interactions between aquatic species, such as riparian vegetation and fishes, and river discharges have been described with SDEs. 16 Miyamoto and Kimura 17 analyzed seedling, growth, and mortality dynamics of riparian trees subject to stochastic flood disturbances. Vesipa et al 18 764

show abstract

“…So suitable parameters can be achieved in dams that are in operation and hydrography of reservoir is carried out at least once. In other words, the method can be calibrated for the reservoir [ISSA et al 2017]. In this study, while comprehensively introducing the area-reduction method, sediment distribution in the reservoir of Karun Dam has been done.…”

Section: Introductionmentioning

confidence: 99%

Journal of Water and Land Development

2022

View full text Add to dashboard Cite

Dam construction is one of the measures that is inevitable in many cases and must be done to supply drinking water, agricultural uses and electricity generation. There are many challenges to a successful dam project, and the managers of each project must consider the appropriate solutions for them. One of the studies that is done in dam design is sedimentation in dam reservoirs. The experimental area-reduction method is a very common technique that obtains the sediment distribution in depth and longitudinal profile. This technique shows that sediment accumulation is not limited to the bottom reservoirs. Sediment accumulation in a reservoir is usually distributed below the top of the protection reservoir or normal water level. In this study, the distribution of sediment in the reservoir of Karun Dam after a period of 65 years has been done using the experimental area-reduction method. Elevation-volume and elevation-area curves of the dam reservoir are obtained after the useful life of the dam and sediment deposition. The results showed that after 65 years, 106.47•10 6 m 3 of sediment is deposited in the reservoir of the dam and the useful volume of the reservoir is significantly reduced. Also, up to a height of 36.4 m, the dam reservoir is filled with sediment. Therefore, no valve should be placed up to this height.

show abstract

Evaluation and modification of some empirical and semi-empirical approaches for prediction of area-storage capacity curves in reservoirs of dams

Cited by 16 publications

References 12 publications

Analisis Dinamika Tingkat Kekeruhan Dan Kedalaman Relatif Perairan Di Waduk Sutami Kabupaten Malang

Analisis Dinamika Tingkat Kekeruhan Dan Kedalaman Relatif Perairan Di Waduk Sutami Kabupaten Malang

Modeling stochastic operation of reservoir under ambiguity with an emphasis on river management

Journal of Water and Land Development

Contact Info

Product

Resources

About