Environmental Flow Scenarios for a Regulated River System: Projecting Catchment‐Wide Ecosystem Benefits and Consequences for Hydroelectric Production

Widén, Åsa; Renöfält, Birgitta Malm; Degerman, Erik; Wisaeus, Dag; Jansson, Roland

doi:10.1029/2021wr030297

Cited by 10 publications

(5 citation statements)

References 82 publications

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“…River buffer affects the occurrence of flooding (Njoku et al, 2018). When the river's capacity cannot accommodate the water discharge, the water will stagnate in the area around the river (Widén et al, 2022). Then, it would cause a flood incident.…”

Section: River Buffer Classificationmentioning

confidence: 99%

Determination of Flood Susceptibility Index Using Overlay-Scoring Data Method based on Geographic Information System (GIS) in Semarang City, Central Java, Indonesia

Romadhon

Aziz

2022

AgriHealth:J.Agr-food.Nutr.Pblchealth

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Semarang City is the capital of the Central Java Province, located in the lowlands and directly adjacent to the north side of the Java Sea. This geographical condition makes this city very vulnerable to being affected by floods. This study aims to determine the distribution of flood-prone locations and classify the level of flood susceptibility that occurs in the Semarang City. Quantitative descriptive is the type of research with an overlay method based on scoring parameters related to environmental conditions. These parameters include slope, soil type, rainfall, altitude, land use and river flow buffers. The scored parameters are then entered into the overlay stage with other parameters in the geographic information system (GIS) application to form a map of the flood susceptibility level. The data analysis technique used the descriptive method. The level of flood susceptibility map resulting from this study is in one area of the Pemali-Juana Sub-watershed. The results also show that the scattered highly vulnerable areas in the northern part of Semarang City are areas with low elevations and flat slopes, then dominated by settlement land use that lacks infiltration areas, small river buffer sizes. These are what make the area classified as an area that is very prone to flooding.

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Section: River Buffer Classificationmentioning

confidence: 99%

Determination of Flood Susceptibility Index Using Overlay-Scoring Data Method based on Geographic Information System (GIS) in Semarang City, Central Java, Indonesia

Romadhon

Aziz

2022

AgriHealth:J.Agr-food.Nutr.Pblchealth

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“…Among the several academic contributions to calculate reoperation tradeoffs between environmental needs and other competing demands with optimization frameworks, a common approach represents e‐flows constraining water allocation to multiple economic uses (Chen et al., 2013; Xu et al., 2020). This may include explicit modeling of flow targets (with annual, seasonal or monthly variation) based on aquatic species requirements (Poff et al., 2017; Widén et al., 2022). Internalizing flow regimes as static (fixed) constraints in the water allocation formulation, however, often yields solutions that fail to explore the full set of objective tradeoffs (Giuliani, Castelletii & Reed, 2014).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Adaptive Environmental Flows (DAE‐Flows) to Reconcile Long‐Term Ecosystem Demands With Hydropower Objectives

Dalcin

Marques

Tilmant

et al. 2023

Water Resources Research

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Decisions on how we operate and allocate water resources, combined with hydroclimatic conditions, can significantly limit the capacity of freshwater ecosystems to cope with and recover from stress periods (e.g., drought events). In reservoir systems, allocating water to environmental demands, characterized by flow regimes (e-flows), is necessary to mitigate impacts on ecosystem functioning (e.g., supporting fish reproduction cycles), but it also presents tradeoffs as it bounds the water storage availability and therefore water allocation to present and future uses in the watershed (Grantham et al., 2014;Wineland et al., 2022).Among the several academic contributions to calculate reoperation tradeoffs between environmental needs and other competing demands with optimization frameworks, a common approach represents e-flows constraining water allocation to multiple economic uses (Chen et al., 2013;Xu et al., 2020). This may include explicit

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“…Artificial flow fluctuations due to hydropeaking can hinder the sustenance rate of aquatic organisms (Glowa et al, 2023; Greimel et al, 2018; Hedger et al, 2023). Thus, to protect the ecosystem and to acquire the maximum benefit of electricity generation, there is a need for an integrated water resources management of regulated rivers (Widén et al, 2022). This implies the reoperation of the reservoir to meet the EFR for enhancing the sustainability of the downstream ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

Devi,

Sarma

2023

Ecohydrology

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The recent surge of anthropogenic activities like damming is causing a severe threat to the aquatic ecosystem. A scope of minimizing the degradation of biota exists by modifying the dam operation policy. This can be achieved by releasing a minimum environmental flow (EF), which further requires more scientific investigations. The present study investigated the impact of an interbasin transfer hydropower dam on the downstream habitat of an endangered fish species, Tor putitora, using an adaptive modelling framework. The framework consists of coupling a reservoir operation and a hydrodynamic model. This study analyses the scope of releasing different EFs from a hydropower dam to meet the environmental flow requirement (EFR) at downstream with satisfactory power production efficiency. The EFR was estimated using flow duration curve and Tennant's method. A lean period inflow hydrograph was incorporated into the model with a series of alternate EFs. Two scenarios were explored, with 4 and 6 h of peaking hours, along with the three cases of different initial reservoir storage. The total usable area over the river reach of the mentioned fish species was evaluated from the flow parameters simulated by the hydrodynamic component of the model. The power production efficiencies and area utilization rates were assessed in all these cases to prepare an easy‐to‐use decision support tool in a tabular form depicting the possible states of EF. The generalized methodology adopted in this analysis will help the decision‐makers quantify EF to be released from the dam within an acceptable power generation efficiency.

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Environmental Flow Scenarios for a Regulated River System: Projecting Catchment‐Wide Ecosystem Benefits and Consequences for Hydroelectric Production

Cited by 10 publications

References 82 publications

Determination of Flood Susceptibility Index Using Overlay-Scoring Data Method based on Geographic Information System (GIS) in Semarang City, Central Java, Indonesia

Determination of Flood Susceptibility Index Using Overlay-Scoring Data Method based on Geographic Information System (GIS) in Semarang City, Central Java, Indonesia

Dynamic Adaptive Environmental Flows (DAE‐Flows) to Reconcile Long‐Term Ecosystem Demands With Hydropower Objectives

Impact of interbasin transfer hydroelectric project on downstream aquatic habitat

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