Risks and uncertainties in reservoir yield in highly variable intermittent rivers: case of the Castanhão Reservoir in semi-arid Brazil

Campos, José Nilson Beserra; Filho, Francisco Assis Souza; Lima, Herbert V.

doi:10.1080/02626667.2013.836277

Cited by 23 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Average annual rainfall varies from 400 to 1,000 mm and a historical annual mean of 756.5 mm during the past 80 years is recorded (FUNCEME 2016). The Middle Jaguaribe Basin, where the reservoir is located, is the driest subbasin of the river and shows a trend of decreasing annual precipitation in the past 90 years (Gondim et al 2012, Campos 2014, Fernandes et al 2017. Potential evaporation amounts for about 2,100 mm (SRH 2008).…”

Section: Environmental Setting Of the Castanhão Reservoirmentioning

confidence: 99%

Limnology of the largest multi-use artificial reservoir in NE Brazil: The Castanhão Reservoir, Ceará State

Lacerda

Santos

Marins

et al. 2018

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

This work reviews the limnology of the largest multi-use reservoir in NE Brazil, the Castanhão Reservoir in Ceará State, during 5 years of an extended drought when the reservoir's volume decreased from 88% to about 30%. Major physical and chemical parameters of the water column, phytoplankton community, trophic state and sediment geochemistry were monitored, as well as the impact from extensive aquaculture. Water quality of the full reservoir was maintained due to hydrodynamics, which transport nutrients to the hypolimnion of a stratified water column, rendering an oligotrophic state to the reservoir, notwithstanding the large nutrient inputs from aquaculture and irrigated agriculture. However, with the extension of the drought period, the reservoir volume reduced, decreasing water depth leading to breaking of the thermocline due to wind forcing, and mixing the entire water column. This increased turbidity, nutrient availability and primary productivity, also changed phytoplankton functional groups. As a result, at the end of the monitoring period, when the reservoir attained its lowest volume, its trophic state became eutrophic. Under a scenario of climate change, where annual precipitation is decreasing, human uses of reservoirs in the semiarid should be very restricted to maintain water quality proper for human use.

show abstract

Section: Environmental Setting Of the Castanhão Reservoirmentioning

confidence: 99%

Limnology of the largest multi-use artificial reservoir in NE Brazil: The Castanhão Reservoir, Ceará State

Lacerda

Santos

Marins

et al. 2018

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

show abstract

“…The model of Campos et al (2014) was adapted to investigate the impact of artificial destratification on evaporation suppression and its effects on the regulated flow of the selected reservoirs. Thus, using monthly stream flow series and average losses (evaporation minus precipitation) provided by Secretaria dos recursos Hídricos do Ceará -SrH (1992), the water budget equation was solved using Monte Carlo simulation to obtain the regulated flow for each reservoir:…”

Section: Hydrological Modellingmentioning

confidence: 99%

Impact of artificial destratification on water availability of reservoirs in the Brazilian semiarid

Neto

2019

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Field surveys and integral modelling were carried out to study the effect of bubble plumes on the flow hydrodynamics and the time-evolution of water temperature profiles in a shallow lake with maximum depth of about 4 m. Then, model simulations were performed to verify the feasibility of destratification of ten water-supply reservoirs with capacities of 10-2,000 hm 3. Finally, hydrological modelling was conducted to assess the impact of destratification on evaporation suppression and its effects on reservoir yield. The results indicate that net temperature reductions of the order of 1.0°C can be obtained, which corresponds to evaporation suppressions of approximately 10%. In turn, this resulted in increases in the regulated flow of 2-12% that could be described by a general correlation. Lastly, a simplified feasibility analysis provided an operational cost of about 1.0 US$ per cubic meter of saved water, which suggests that artificial destratification cannot be discarded as an alternative for supplementing water supply in rural water-scarce regions.

show abstract

“…The optimal results of CROO are usually used to extract the mid-and long-term operation rules of cascade reservoirs (Lerma et al 2013, Sharma et al 2015, Jiang et al 2018a); so it is necessary to solve the CROO problem correctly and reasonably. However, due to the complicated hydrodynamic relationship and various constraints, CROO has been taken into a multidimensional, nonconvex and nonlinear optimization problem (Campos et al 2014). Correspondingly, solving the CROO problem has become a fairly challenging theoretical and practical problem, and it is urgent for powerful optimization techniques to be developed; this is attracting the attention of more and more scholars around the world Moradi 2016, Zhou et al 2016).…”

Section: Introductionmentioning

confidence: 99%

An improved shuffled frog leaping algorithm and its application in the optimization of cascade reservoir operation

Jiang

et al. 2018

Hydrological Sciences Journal

View full text Add to dashboard Cite

A new improved shuffled frog leaping algorithm (SFLA), the chaos catfish effect SFLA (CCESFLA), is proposed by coupling a local "refine search" mechanism and a "global incentive adjustment" mechanism. Chaotic technology is introduced in the local "refine search" mechanism to improve local search ability, by implementing more refined local search around the optimal individuals. The catfish effect mechanism is adopted in the "global incentive adjustment" mechanism to improve global convergence, by motivating the frogs to "jump out" of the local steady state. The operation optimization by the CCESFLA is carried out taking the Li Xianjiang cascade reservoirs in China as an example. Compared with SFLA, particle swarm optimization, immune SFLA and cloud SFLA, the average annual power generation using the CCESFLA can be increased by 6.7, 7.5, 3.0 and 0.8%, respectively. The convergence process of the CCESFLA is more stable, and its execution time is the least of the three improved SFLAs.

show abstract

Risks and uncertainties in reservoir yield in highly variable intermittent rivers: case of the Castanhão Reservoir in semi-arid Brazil

Cited by 23 publications

References 29 publications

Limnology of the largest multi-use artificial reservoir in NE Brazil: The Castanhão Reservoir, Ceará State

Limnology of the largest multi-use artificial reservoir in NE Brazil: The Castanhão Reservoir, Ceará State

Impact of artificial destratification on water availability of reservoirs in the Brazilian semiarid

An improved shuffled frog leaping algorithm and its application in the optimization of cascade reservoir operation

Contact Info

Product

Resources

About