scholarly journals A Phased Assessment of Restoration Alternatives to Achieve Phosphorus Water Quality Targets for Lake Okeechobee, Florida, USA

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 327 ◽  
Author(s):  
Yogesh Khare ◽  
Ghinwa Naja ◽  
G. Stainback ◽  
Christopher Martinez ◽  
Rajendra Paudel ◽  
...  
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Nutrient Management ◽  
Control Strategies ◽  
Cost Effective ◽  
South Florida ◽  
Assessment Model ◽  
Lake Okeechobee ◽  
Stormwater Treatment ◽  
Maximum Daily Loads

Achieving total phosphorus (TP) total maximum daily loads (TMDL) for Lake Okeechobee (Florida, FL, USA), a large freshwater lake, is a key component of the greater Everglades ecosystem restoration and sustainability of south Florida. This study was aimed at identification of a cost-effective restoration alternative using four TP control strategies—Best Management Practices (BMPs), Dispersed Water Management (DWM), Wetland Restoration, and Stormwater Treatment Areas (STAs)—to achieve a flow-weighted mean TP concentration of 40 µg/L at lake inflow points, through a phased scenario analysis approach. The Watershed Assessment Model was used to simulate flow and phosphorus dynamics. The 10-year (1998–2007) ‘Base’ scenario calibration indicated ‘acceptable’ to ‘good’ performance with simulated annual average flows and TP load of 2.64 × 109 m3 and 428.6 metric tons, respectively. Scenario results showed that TP load reduction without STAs would be around 11–40% with respect to Base compared to over 75% reduction requirement to achieve TMDL, indicating STAs as a necessary component to achieve restoration. The most cost-effective alternative to achieve TP target consisted of implementation of nutrient management BMPs, continuation of existing DWM projects, and the construction of ~200 km2 of STAs for a total project cost of US $4.26 billion.

Agricultural best management practices and surface water improvement and management

1995 ◽  
Vol 31 (8) ◽  
pp. 109-121 ◽  
Author(s):  
D. L. Anderson ◽  
E. G. Flaig
Keyword(s):  
Water Management ◽  
Surface Water ◽  
Best Management Practices ◽  
Management Practices ◽  
Agricultural Runoff ◽  
South Florida ◽  
Lake Okeechobee ◽  
Runoff Water ◽  
Best Management ◽  
Management Plans

Restoration and enhancement of Lake Okeechobee and the Florida Everglades requires a comprehensive approach to manage agricultural runoff. The Florida Surface Water Improvement and Management (SWIM) Act of 1987 was promulgated to develop and implement plans for protecting Florida waters. The South Florida Water Management District was directed by Florida legislature to develop management plans for Lake Okeechobee (SWIM) and the Everglades ecosystem (Marjory Stoneman Douglas Everglades Protection Act of 1991). These plans require agriculture to implement best management practices (BMPs) to reduce runoff phosphorus (P) loads. The Lake Okeechobee SWIM plan established a P load reduction target for Lake Okeechobee and set P concentration limitations for runoff from non-point source agricultural sources. Agricultural water users in the Everglades Agricultural Area (EAA) are required to develop farm management plans to reduce P loads from the basin by 25%. The Everglades Forever Act of 1994 additionally emphasized linkage of these landscapes and consequent protection and restoration of the Everglades. Agricultural BMPs are being developed and implemented to comply with water management, environmental, and regulatory standards. Although BMPs are improving runoff water quality, additional research is necessary to obtain the best combination of BMPs for individual farms. This paper summarizes the development of comprehensive water management in south Florida and the agricultural BMPs carried out to meet regulatory requirements for Lake Okeechobee and the Everglades.

scholarly journals Assessing Opportunities to Increase Yield and Profit in Rainfed Lowland Rice Systems in Indonesia

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 777
Author(s):  
Erythrina Erythrina ◽  
Arif Anshori ◽  
Charles Y. Bora ◽  
Dina O. Dewi ◽  
Martina S. Lestari ◽  
...  
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Nutrient Management ◽  
Agricultural Research ◽  
Rice Yield ◽  
Information Access ◽  
Water Reservoir ◽  
Dry Season ◽  
Rice Production ◽  
Yield Gap

In this study, we aimed to improve rice farmers’ productivity and profitability in rainfed lowlands through appropriate crop and nutrient management by closing the rice yield gap during the dry season in the rainfed lowlands of Indonesia. The Integrated Crop Management package, involving recommended practices (RP) from the Indonesian Agency for Agricultural Research and Development (IAARD), were compared to the farmers’ current practices at ten farmer-participatory demonstration plots across ten provinces of Indonesia in 2019. The farmers’ practices (FP) usually involved using old varieties in their remaining land and following their existing fertilizer management methods. The results indicate that improved varieties and nutrient best management practices in rice production, along with water reservoir infrastructure and information access, contribute to increasing the productivity and profitability of rice farming. The mean rice yield increased significantly with RP compared with FP by 1.9 t ha–1 (ranges between 1.476 to 2.344 t ha–1), and net returns increased, after deducting the cost of fertilizers and machinery used for irrigation supplements, by USD 656 ha–1 (ranges between USD 266.1 to 867.9 ha–1) per crop cycle. This represents an exploitable yield gap of 37%. Disaggregated by the wet climate of western Indonesia and eastern Indonesia’s dry climate, the RP increased rice productivity by 1.8 and 2.0 t ha–1, with an additional net return gain per cycle of USD 600 and 712 ha–1, respectively. These results suggest that there is considerable potential to increase the rice production output from lowland rainfed rice systems by increasing cropping intensity and productivity. Here, we lay out the potential for site-specific variety and nutrient management with appropriate crop and supplemental irrigation as an ICM package, reducing the yield gap and increasing farmers’ yield and income during the dry season in Indonesia’s rainfed-prone areas.

Long-term Water Quality Trends after Implementing Best Management Practices in South Florida

2009 ◽  
Vol 38 (4) ◽  
pp. 1683-1693 ◽  
Author(s):  
Samira H. Daroub ◽  
Timothy A. Lang ◽  
Orlando A. Diaz ◽  
Sabine Grunwald
Keyword(s):  
Water Quality ◽  
Best Management Practices ◽  
Management Practices ◽  
South Florida ◽  
Best Management ◽  
Water Quality Trends

scholarly journals An evaluation of British Columbia's medications return program as a management framework for collecting unused/expired pharmaceuticals

2021 ◽  
Author(s):  
Muhammad Asif Mahmood
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Cold Water ◽  
Control Strategies ◽  
Phosphorus Concentration ◽  
Phosphorus Load ◽  
Aquatic Life ◽  
Management Framework ◽  
Best Management ◽  
Source Level

Lake Simcoe is a major source of fresh water supply and serves as a favorite hub for recreational activities in southern Ontario. The cold water aquatic life of this Lake is facing serious threats due to depleted levels of oxygen caused by excessive growth of algal plants. The major reason for this growth is the entrance of high phosphorus loads through heavy stream discharges in the months of January until April. The results of analysis of phosphorus concentration and flows conducted in this project shows a direct dependence of phosphorus load on flow. Although the relation of rainfall and phosphorus load could not be supported by strong statistical evidence, the flow variations have been shown to be the major cause of variations in phosphorus load. The control strategies should be focused on reducing the generation of phosphorus at source level and preventing the direct entry of heavy flushes in the lake though Best Management Practices (BMPs), including detention facilities.

scholarly journals Multi-Objective Optimization for Selecting and Siting the Cost-Effective BMPs by Coupling Revised GWLF Model and NSGAII Algorithm

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 235 ◽  
Author(s):  
Zuoda Qi ◽  
Gelin Kang ◽  
Xiaojin Wu ◽  
Yuting Sun ◽  
Yuqiu Wang
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Cost Effective ◽  
Control Measures ◽  
Multi Objective Optimization ◽  
Watershed Model ◽  
Filter Strips ◽  
Multi Objective ◽  
Dissolved Nitrogen ◽  
The Cost

Best management practices (BMPs) are an effective way to control water pollution. However, identification of the optimal distribution and cost-effect of BMPs provides a great challenge for watershed policy makers. In this paper, a semi-distributed, low-data, and robust watershed model, the Revised Generalized Watershed Loading Function (RGWLF), is improved by adding the pollutant attenuation process in the river channel and a bank filter strips reduction function. Three types of pollution control measures—point source wastewater treatment, bank filter strips, and converting farmland to forest—are considered, and the cost of each measure is determined. Furthermore, the RGWLF watershed model is coupled with a widely recognized multi-objective optimization algorithm, the non-dominated sorting genetic algorithm II (NSGAII), the combination of which is applied in the Luanhe watershed to search for spatial BMPs for dissolved nitrogen (DisN). Fifty scenarios were finally selected from numerous possibilities and the results indicate that, at a minimum cost of 9.09 × 107 yuan, the DisN load is 3.1 × 107 kg and, at a maximum cost of 1.77 × 108 yuan, the total dissolved nitrogen load is 1.31 × 107 kg; with the no-measures scenario, the DisN load is 4.05 × 107 kg. This BMP optimization model system could assist decision-makers in determining a scientifically comprehensive plan to realize cost-effective goals for the watershed.

Evaluation of stormwater BMPs for implementing industrial stormwater permitting strategy

2010 ◽  
Vol 62 (11) ◽  
pp. 2558-2563 ◽  
Author(s):  
M.-H. Park ◽  
I. K. Ridgeway ◽  
X. Swamikannu ◽  
M. K. Stenstrom
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Metal Removal ◽  
Effluent Quality ◽  
Best Management ◽  
Industrial Sectors ◽  
Significant Difference ◽  
Maximum Daily Loads ◽  
Total Maximum ◽  
Additional Monitoring

This study assesses the performance of stormwater best management practices (BMPs) in industrial sectors and their effluent quality to facilitate the development of technology-based numerical effluent criteria. Generally, retention ponds outperform other BMP types for reducing total suspended solids, and media filter and wetland basins outperform other BMPs for metal removal. Detention basins were not effective in reducing stormwater pollution although they can retain the stormwater before entering surface waters. However, many BMPs show high variability of influent and effluent concentrations and no significant difference between them, which makes it difficult to determine the effectiveness of the BMP. In some cases, low influent concentrations govern the distribution of effluent concentrations and effluent concentrations are often greater than inflow concentrations. The analysis results can be used to assist in the developing a watershed based multisector industrial stormwater general permit to ensure compliance with total maximum daily loads. The results also suggest the need for additional monitoring data.

scholarly journals Sensitive and Rapid Detection of Citrus Scab Using an RPA-CRISPR/Cas12a System Combined with a Lateral Flow Assay

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2132
Author(s):  
Kihye Shin ◽  
Soon-Hwa Kwon ◽  
Seong-Chan Lee ◽  
Young-Eel Moon
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Detection System ◽  
Point Of Care ◽  
Infected Plant ◽  
Cost Effective ◽  
Lateral Flow ◽  
Fungal Diseases ◽  
Lateral Flow Assay ◽  
Readout System

Citrus is the most extensively produced fruit tree crop in the world and is grown in over 130 countries. Fungal diseases in citrus can cause significant losses in yield and quality. An accurate diagnosis is critical for determining the best management practices and preventing future losses. In this study, a Recombinase polymerase amplification (RPA)-clustered regularly interspaced short palindromic repeats (CRISPR)/associated (Cas) system was established with the integration of a lateral flow assay (LFA) readout system for diagnosis of citrus scab. This detection can be completed within 1 h, is highly sensitive and prevents cross-reactions with other common fungal citrus diseases. Furthermore, the detection system is compatible with crude DNA extracted from infected plant tissue. This RPA-CRISPR/Cas12a-LFA system provides a sensitive, rapid, and cost-effective method with promising and significant practical value for point-of-care diagnosis of citrus scab. To our knowledge, this is the first report to establish an RPA- and CRISPR-based method with LFA for fungal diseases in plants.

scholarly journals Pollutant Loading Analysis of Suspended Solid, Nitrogen and Phosphorus at Bertam Catchment, Cameron Highlands using MUSIC

2018 ◽  
Vol 7 (4.35) ◽  
pp. 743
Author(s):  
N.S.M. Noh ◽  
L.M. Sidek ◽  
S.H. Haron ◽  
A. H. M. Puad ◽  
Z. Selamat
Keyword(s):  
Best Management Practices ◽  
Management Practices ◽  
Calculated Data ◽  
Suspended Solid ◽  
Stormwater Treatment ◽  
Urban Stormwater ◽  
Nitrogen And Phosphorus ◽  
Reservoir Water ◽  
Pollutant Loading ◽  
Cameron Highlands

This paper aimed to analyze the pollutant loading composition of suspended solids, nitrogen and phosphorus in urban stormwater at Cameron Highlands which known as popular tourism, agriculture and function as reservoir water to generate electricity. Researchers found the urban stormwater quantity modeling has achieved sufficient accuracy benchmark. However, modeling stormwater runoff quality is relatively difficult and largely depends on catchment characteristics/land-uses. Model of Urban Stormwater Improvement Conceptualization (MUSIC) estimates pollutant transport from catchments and stormwater treatment through different application of Best Management Practices (BMPs). Result obtained from the observed and calculated data was compared with MUSIC's estimations under a similar scenario where no applications of BMPs. As a second scenario, series of treatment train is propose for each sub-catchments based on the suitability and verification on site that consists of constructed stormwater treatment BMPs (wetlands, bio-retention, on-site detention, sediment basin and gross pollutant traps). Implementation of BMPs reduce nearly 100% of gross pollutant, 65% - 83% TSS, 40% - 66% TP and 52% - 78% due to effectiveness of BMPs in treating the pollutant within different landuse. As a summary, MUSIC can conceptually determine the effectiveness of BMPs without giving a detailed design.

Sign in / Sign up

Export Citation Format

Share Document