Hydraulic retrofits can economically increase water and phosphorus retentions in end-of-the-farm stormwater systems
| Autor: | Alan W. Hodges, Rajendra P. Sishodia, Asmita Shukla, Sanjay Shukla |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Renewable Energy
Sustainability and the Environment business.industry Strategy and Management Phosphorus Stormwater Water storage Environmental engineering chemistry.chemical_element Building and Construction Industrial and Manufacturing Engineering Volume (thermodynamics) chemistry Agriculture Excess water Environmental science Water quality business Saturation (chemistry) General Environmental Science |
| Zdroj: | Journal of Cleaner Production. 329:129554 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2021.129554 |
| Popis: | Aging agricultural stormwater detention systems (SDSs) are losing their ability to retain Phosphorus (P) due to saturation. Soil P saturation leads to P retention being primarily dependent on water volume retention. The water quality and economic feasibility of hydraulic modifications were evaluated at an SDS in the Everglades basin. Modifications included compartmentalizing and increasing the retention volume by raising the discharge control elevation. Measurements showed increase in volumetric retention from 49% to 72% and P retention from 52% to 76%. Model simulations for a 25-year period showed that volume and P retentions could be as high as 92% with modifications, depending on the rainfall distribution. Economic analyses showed that modifications can provide additional water storage at $10/ac-ft ($81/ha-m) and P retention at $14/kg, which is more economical than the respective costs of 103/ac-ft ($835/ha-m) and $355-$909/kg P for the state-operated treatment systems. Basin-wide scale-up showed a potential reduction of 43,000 kg P per year. Modification costs are conservative since we assumed that additional water and P would be retained once every two years due to the occurrence of drier/wetter than normal years. Everglades is facing a multitude of challenges such as the timing and amounts of excess discharges of freshwater and P. We propose a payment for environmental services (PES) approach which lets the state choose the services depending on the specific challenges, such as excess water or P or both. Given the large-scale presence of SDSs or similar features globally, a public-private partnership to modify their hydraulic design can help achieve environmental goals, economically benefitting both the public (buyer) and private landowners (sellers). |
| Databáze: | OpenAIRE |
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