Bayesian Calibration Points to Misconceptions in Three‐Dimensional Hydrodynamic Reservoir Modeling DOI Creative Commons
Sebastian Schwindt, Sergio Callaú Medrano, Kilian Mouris

et al.

Water Resources Research, Journal Year: 2023, Volume and Issue: 59(3)

Published: Feb. 20, 2023

Abstract Three‐dimensional (3d) numerical models are state‐of‐the‐art for investigating complex hydrodynamic flow patterns in reservoirs and lakes. Such full‐complexity computationally demanding their calibration is challenging regarding time, subjective decision‐making, measurement data availability. In addition, physically unrealistic model assumptions or combinations of parameters may remain undetected lead to overfitting. this study, we investigate if how so‐called Bayesian aids characterizing faulty setups driven by parameter combinations. builds on recent developments machine learning uses a Gaussian process emulator as surrogate model, which runs considerably faster than 3d model. We Bayesian‐calibrate Delft3D‐FLOW pump‐storage reservoir function the background horizontal eddy viscosity diffusivity, initial water temperature profile. consider three scenarios with varying degrees different velocity measurements. One forces completely unrealistic, rapid lake stratification still yields similarly good accuracy more correct global statistics, such root‐mean‐square error. An uncertainty assessment resulting from indicates that scenario fast through highly uncertain mixing‐related parameters. Thus, describes quality correctness geometric characteristics posterior distributions. For instance, most likely values (posterior distribution maxima) at range limit widespread characterize poor calibration.

Language: Английский

Evaluation, prediction, and protection of water quality in Danjiangkou Reservoir, China DOI Creative Commons

Xiaokang Xin,

Kefeng Li, Brian Finlayson

et al.

Water Science and Engineering, Journal Year: 2015, Volume and Issue: 8(1), P. 30 - 39

Published: Jan. 1, 2015

Abstract The water quality in the Danjiangkou Reservoir has attracted considerable attention from Chinese public and government since announcement of Middle Route South to North Water Diversion Project (SNWDP), which commenced transferring 2014. Integrated research on evaluation, prediction, protection was carried out this study order improve environmental management. Based 120 samples, wherein 17 indices were measured at 20 monitoring sites, a single factor evaluation method used evaluate current status quality. results show that main influencing are total phosphorus (TP), permanganate index (COD Mn ), dissolved oxygen (DO), five-day biochemical demand (BOD 5 concentrations TP, BOD , ammonia nitrogen (NH 3 –N), COD DO, anionic surfactant (Surfa) do not reach specified standard levels tributaries. Seasonal Mann–Kendall tests indicated concentration shows highly significant increasing trend, TP trend Reservoir. distribution predicted using two-dimensional numerical model, showed sphere influence tributaries can spread across half Han if pollutants controlled. Cluster analysis (CA) suggest Shending River is heavily polluted, Jianghe, Sihe, Jianhe rivers moderately they should be focus remediation.

Language: Английский

Citations

63
Effects of the impounding process during the flood season on algal blooms in Xiangxi Bay in the Three Gorges Reservoir, China DOI
Mingying Chuo, Jun Ma, Defu Liu

et al.

Ecological Modelling, Journal Year: 2018, Volume and Issue: 392, P. 236 - 249

Published: Dec. 6, 2018

Language: Английский

Citations

52
Remote Sensing‐Based Modeling of the Bathymetry and Water Storage for Channel‐Type Reservoirs Worldwide DOI
Kai Liu, Chunqiao Song, Jida Wang

et al.

Water Resources Research, Journal Year: 2020, Volume and Issue: 56(11)

Published: Oct. 19, 2020

Abstract Estimations of reservoir bathymetry and storage are great significance due to their substantial impacts on hydrological processes water resource management. However, existing approaches for construction often rely field measurements, which restricts application at regional global scales. This study proposes a novel Approach Determining the BAthymetry channel‐type Reservoirs, hereafter referred as ADBAR, only open‐access digital elevation model (DEM) satellite images required. The basic idea ADBAR is utilize geomorphological similarity topographical continuity inundation area with its lateral valleys upstream/downstream regions predict underwater bathymetry. Forty‐eight reservoirs different topographic geometric characteristics were selected method validation. all impounded after year 2000, so modeled can be validated by “reference” calculated using exposed topography in SRTM DEM mapped extents from spectral images. difference between estimated reference storages about 13% average. Furthermore, results two basins dense distributions, Upper Yellow River Basin China Tocantins Brazil, comparable documented effective capacities. validations both individual large demonstrate that robust tool estimating bathymetries capacities thus facilitates modeling budgets

Language: Английский

Citations

48
Eco-environmentally friendly operational regulation: an effective strategy to diminish the TDG supersaturation of reservoirs DOI Creative Commons
J. Feng, Ran Li,

Ruifeng Liang

et al.

Hydrology and earth system sciences, Journal Year: 2014, Volume and Issue: 18(3), P. 1213 - 1223

Published: March 28, 2014

Abstract. The presence of elevated total dissolved gas (TDG) downstream a spillway may result in an increased incidence bubble disease fish. Supersaturated TDG is transported and dissipated more slowly reservoirs than natural rivers because higher water depth lower turbulence thus endangers This paper presents the operational regulations concerning mitigation supersaturation impact on fish Bala Reservoir Zumuzu River. includes joint operations upstream power stations. A laterally averaged two-dimensional model employed to simulate transportation dissipation addition hydrodynamics temperature. According comparison simulation results different scenarios, this suggests regulation scheme. With respect station, adoption interval-discharge pattern instead continuous-discharge recommended minimize negative effect reservoir caused by supersaturated TDG. surface tunnel rather bottom as release structure. reference for eco-environmentally friendly operation large deep reservoirs.

Language: Английский

Citations

43
Modeling the effect of temperature-control curtain on the thermal structure in a deep stratified reservoir DOI
Wei He, Jijian Lian, Ye Yao

et al.

Journal of Environmental Management, Journal Year: 2017, Volume and Issue: 202, P. 106 - 116

Published: July 17, 2017

Language: Английский

Citations

40
3-D hydro-environmental simulation of Miyun reservoir, Beijin DOI

Yuhui Wang,

Yunzhong Jiang, Weihong Liao

et al.

Journal of Hydro-environment Research, Journal Year: 2013, Volume and Issue: 8(4), P. 383 - 395

Published: Sept. 18, 2013

Language: Английский

Citations

42
Longitudinal Hydrodynamic Characteristics in Reservoir Tributary Embayments and Effects on Algal Blooms DOI Creative Commons

Huichao Dai,

Jingqiao Mao,

Dingguo Jiang

et al.

PLoS ONE, Journal Year: 2013, Volume and Issue: 8(7), P. e68186 - e68186

Published: July 11, 2013

Three Gorges Reservoir (TGR) is one of the largest man-made lakes in world. Since impoundment 2003, however, algal blooms have been often observed tributary embayments. To control blooms, a thorough understanding hydrodynamics (e.g., flow regime, velocity gradient, and magnitude direction) embayments particularly important. Using calibrated three-dimensional hydrodynamic model, we carried out analysis typical embayment (i.e., Xiangxi Bay) with emphasis on longitudinal patterns. The results show distinct gradients study area, which can be generally characterized as four zones: riverine, intermediate, lacustrine, mainstream influenced zones. Compared zonation for pure reservoir, there an additional zone near mouth due to strong effects TGR mainstream. are prone occur intermediate lacustrine zones; conditions riverine influence zones not propitious formation blooms. This finding helps diagnose sensitive areas bloom occurrence.

Language: Английский

Citations

40
Tempo-spatial analysis of water quality in tributary bays of the Three Gorges Reservoir region (China) DOI
Jialiang Tang, Tao Wang, Bo Zhu

et al.

Environmental Science and Pollution Research, Journal Year: 2015, Volume and Issue: 22(21), P. 16709 - 16720

Published: June 19, 2015

Language: Английский

Citations

35
Predicting Soil Erosion After Land Use Changes for Irrigating Agriculture in a Large Reservoir of Southern Portugal DOI Creative Commons
Vera Ferreira, Τhomas Panagopoulos,

Anda Cakula

et al.

Agriculture and Agricultural Science Procedia, Journal Year: 2015, Volume and Issue: 4, P. 40 - 49

Published: Jan. 1, 2015

The construction of the Alqueva reservoir in a semi-arid Mediterranean landscape brought new opportunities for irrigated farming.Land use changes and climate change may alter risk soil erosion that was not predicted initial development plans decrease lifetime investment.A comprehensive methodology integrates Revised Universal Soil Loss Equation (RUSLE) geographic information system adopted to study effect on different land-uses region.Analysing each land-use it obtained following land vulnerability: Olive orchard>Vineyard>Montado>Alfalfa.The strong variances were observed area show importance locating 'hot spots' erosion.Simulated scenarios entire can be used as basis site-specific conservation plans, promote sustainable management practices facilitate localized control environmentally friendly farming.

Language: Английский

Citations

34
A method for simulating spatial fates of chemicals in flowing lake systems: Application to phthalates in a lake DOI

Yaqi Guo,

Chenchen Wang,

Panpan Huang

et al.

Water Research, Journal Year: 2023, Volume and Issue: 232, P. 119715 - 119715

Published: Feb. 9, 2023

Language: Английский

Citations

9