Balancing water reuse and ecological support goals in an effluent dominated river

Wolfand, Jordyn M.; Taniguchi-Quan, Kristine; Abdi, Reza; Gallo, Elizabeth; Irving, Katie; Philippus, Daniel; Rogers, Jennifer B.; Stein, Eric D.; Hogue, T. S.

doi:10.1016/j.hydroa.2022.100124

Cited by 11 publications

(17 citation statements)

References 38 publications

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“…The mainstem of the river is divided into six reaches based on regulatory compliance (Figure ). Wastewater return flows from three water reclamation plants (WRPs)referred to as Los Angeles–Glendale (Glendale), Burbank, and Donald C. Tillman (Tillman)make up the majority of dry weather flow (i.e., nonstorm flow) in the river . The river is heavily urbanized and managed for water supply via dams, reservoirs, and spreading grounds.…”

Section: Methodsmentioning

confidence: 99%

“…Wastewater return flows from three water reclamation plants (WRPs)�referred to as Los Angeles−Glendale (Glendale), Burbank, and Donald C. Tillman (Tillman)�make up the majority of dry weather flow (i.e., nonstorm flow) in the river. 23 The river is heavily urbanized and managed for water supply via dams, reservoirs, and spreading grounds. The climate is Mediterranean, with wet winters and dry summers, and the average annual rainfall varies across the watershed from 200 to 460 mm (8 to 18 in.).…”

Section: ■ Introductionmentioning

confidence: 99%

“…A water quality module for the LA River watershed was developed and integrated into a hydrologic model for the watershed. The hydrologic model (described in detail in Wolfand et al, 23 Stein et al, 29 and Stein et al 28 ) runs at an hourly time-step and was previously created, calibrated, and validated in EPA SWMM for water years 2011 to 2017. Briefly, the hydrologic model has 77 catchments (average size = 15.8 km 2 ), and its calibration and validation performance were generally considered "good" to "very good" 30 with a Nash-Sutcliffe Efficiency (NSE) between 0.66 and 0.94 and percent bias between −20% and 17.3%.…”

Section: ■ Introductionmentioning

confidence: 99%

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Dilution and Pollution: Assessing the Impacts of Water Reuse and Flow Reduction on Water Quality in the Los Angeles River Basin

et al. 2022

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Los Angeles (LA), California, USA is one of many population-dense, arid cities whose treated wastewater discharge comprises most of the river flow (up to 70% in the LA River). Like other arid cities, LA plans to improve water supply by reusing treated wastewater and diverting nonstorm stormdrain flows. This study quantifies the impact of these management actions on pollutant loads and concentrations in the LA River. Daily pollutant loads and concentrations for total suspended solids (TSS), total dissolved solids (TDS), copper, zinc, and lead were predicted using EPA SWMM across nine wastewater reuse and nonstorm stormdrain diversion scenarios. Reduced flows generally decreased daily loads for all pollutants, but the impact on daily concentrations varied. Concentrations of TDS, TSS, copper, and lead increased with wastewater reuse, while zinc concentrations increased with the reduction of nonstorm stormdrain flows. Copper, zinc, and TDS water quality objectives were met less frequently with increasing flow reduction. These results elucidate the potential impacts of flow reductions on water quality and will help inform management decisions in effluent-dominated rivers.

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Section: Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Dilution and Pollution: Assessing the Impacts of Water Reuse and Flow Reduction on Water Quality in the Los Angeles River Basin

et al. 2022

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“…In many regions, the discharge of effluent into dewatered streams incidentally helps re-create aquatic and riparian habitat that was previously lost ( Boyle & Fraleigh, 2003 ; Luthy et al, 2015 ; Wolfand et al, 2022 ), and can even support endangered aquatic and riparian species. For example, endangered California red-legged frogs ( Rana draytonii ) and San Francisco garter snakes ( Thamnophis sirtalis tetrataenia ) are found in effluent-dependent streams in California ( Halaburka et al, 2013 ; Luthy et al, 2015 ) and endangered Gila topminnow ( Poeciliopsis occidentalis ) are found in similar streams in Arizona ( Minckley, 1999 ; Sonoran Institute, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Seasonal and longitudinal water quality dynamics in three effluent-dependent rivers in Arizona

Hamdhani

Eppehimer

Quanrud

et al. 2023

PeerJ

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Effluent-fed streams, which receive inputs from wastewater treatment plants, are becoming increasingly common across the globe as urbanization intensifies. In semi-arid and arid regions, where many natural streams have dried up due to over extraction of water, many streams rely completely on treated effluent to sustain baseflow during dry seasons. These systems are often thought of as ‘second-class’ or highly disturbed stream ecosystems, but they have the potential to serve as refuges for native aquatic biota if water quality is high, especially in areas where few natural habitats remain. In this study, we investigated seasonal and longitudinal water quality dynamics at multiple sites across six reaches of three effluent-dependent rivers in Arizona (USA) with the objective (1) to quantify changes in effluent water quality due to distance traveled and season/climate and (2) to qualify whether water quality conditions in these systems are sufficient to support native aquatic species. Study reaches ranged in length from 3 to 31 km and in geographic setting from low desert to montane conifer forest. We observed the lowest water quality conditions (e.g., elevated temperature and low dissolved oxygen) during the summer in low desert reaches, and significantly greater natural remediation of water quality in longer vs. shorter reaches for several factors, including temperature, dissolved oxygen and ammonia. Nearly all sites met or exceeded water quality conditions needed to support robust assemblages of native species across multiple seasons. However, our results also indicated that temperature (max 34.2 °C), oxygen levels (min 2.7 mg/L) and ammonia concentrations (max 5.36 mg/L N) may occasionally be stressful for sensitive taxa at sites closest to effluent outfalls. Water quality conditions may be a concern during the summer. Overall, effluent-dependent streams have the capacity to serve as refuges for native biota in Arizona, and they may become the only aquatic habitat available in many urbanizing arid and semi-arid regions.

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“…Estimating discharge inflow and variability is important in analyzing water management planning, irrigation, hydropower, and river ecosystems [1]- [5]. The increasing population growth and the accompanying increases in water demand, especially for domestic, industry, and irrigation, have attracted significant interest from researchers to improve the estimation method of river discharge in the context of operational water management [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Monthly Inflow Forecasting of Three Multi-Purpose Reservoirs

Margini¹,

Anwar²,

Wardoyo³

et al. 2022

Int. J. Adv. Sci. Eng. Inf. Technol.

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The need for inflow discharge forecasts is the first step in the process of integrating water management. To overcome this problem, a discharge forecasting analysis system is needed. This paper adopts a seasonal autoregressive integrated moving average forecasting analysis model, SARIMA. This method was chosen and then applied to the inflow discharge data of the Wonorejo Reservoir to obtain the best model. Determination of the best model through forecasting performance measures using the minimum Mean Square Error (MSE). The best model has an MSE of 11.79 on discharge data for 18 years from 2003 to 2020. The best forecast model is then evaluated on the Bendo Reservoir and Sampean Reservoir. The difference between this paper and others is that one model is used for three different multi-purpose reservoirs and obtains feasible results for each reservoir. Therefore, the authors conclude that the forecasting results of the SARIMA (1,0,0)(0,1,1) 12 model can be applied to Wonorejo Reservoir, Bendo Reservoir, and Sampean Reservoir in East Java Province, Indonesia. The best model from the analysis process is that in the Wonorejo Reservoir, the inflow prediction is satisfactory for the next five years, the Sampean Reservoir for the next four years, and the Bendo Reservoir is the best forecast for the next three years. The results of this forecasting model can be used to analyze the optimization of multi-purpose reservoir management and reduce the risk of reservoir water shortages. Further research can be carried out to achieve extreme values in inflow discharge forecasting.

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Balancing water reuse and ecological support goals in an effluent dominated river

Cited by 11 publications

References 38 publications

Dilution and Pollution: Assessing the Impacts of Water Reuse and Flow Reduction on Water Quality in the Los Angeles River Basin

Dilution and Pollution: Assessing the Impacts of Water Reuse and Flow Reduction on Water Quality in the Los Angeles River Basin

Seasonal and longitudinal water quality dynamics in three effluent-dependent rivers in Arizona

Monthly Inflow Forecasting of Three Multi-Purpose Reservoirs

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