Ponding Surface Drainage Water for Sediment and Phosphorus Removal

1981 ◽  
Vol 24 (6) ◽  
pp. 1478-1481 ◽  
Author(s):  
M. J. Brown ◽  
J. A. Bondurant ◽  
C. E. Brockway
1975 ◽  
Vol 4 (3) ◽  
pp. 399-402 ◽  
Author(s):  
G. H. Willis ◽  
R. L. Rogers ◽  
L. M. Southwick

2018 ◽  
Vol 62 (1) ◽  
pp. 48-68 ◽  
Author(s):  
Christine L. Christensen ◽  
Mike J. Hedley ◽  
James A. Hanly ◽  
David J. Horne

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2149 ◽  
Author(s):  
Vinayak S. Shedekar ◽  
Chad J. Penn ◽  
Lindsay Pease ◽  
Kevin W. King ◽  
Margaret M. Kalcic ◽  
...  

Several structural, treatment, and management approaches exist to minimize phosphorus (P) transport from agricultural landscapes (e.g., cover cropping and conservation tillage). However, many of these practices are designed to minimize particulate P transport and are not as effective in controlling dissolved P (DP) losses. Phosphorus removal structures employ a P sorption material (PSM) to trap DP from flowing water. These structures have been successful in treating surface runoff by utilizing aluminum (Al)-treated steel slag, but subsurface tile drainage has never been tested with this material. The goal of this study was to evaluate the performance and economics of a ditch-style P removal structure using Al-treated steel slag for treating agricultural subsurface drainage discharge. The structure treated subsurface drainage water from a 4.5 ha agricultural field with elevated soil test P levels. Overall, the structure removed approximately 27% and 50% of all DP and total P (TP) entering the structure, respectively (i.e., 2.4 and 9.4 kg DP and TP removal). After an initial period of strong DP removal, the discrete DP removal became highly variable. Flow-through analysis of slag samples showed that the slag used to construct the structure was coarser and less sorptive compared to the slag samples collected prior to construction that were used to design and size the structure. Results of this study highlight the importance of correctly designing the P removal structures using representative PSMs.


2020 ◽  
Vol 156 ◽  
pp. 105968
Author(s):  
Lorenzo Pugliese ◽  
Michele De Biase ◽  
Francesco Chidichimo ◽  
Goswin J. Heckrath ◽  
Bo V. Iversen ◽  
...  

AMBIO ◽  
2020 ◽  
Vol 49 (11) ◽  
pp. 1820-1837 ◽  
Author(s):  
Mette Vodder Carstensen ◽  
Fatemeh Hashemi ◽  
Carl Christian Hoffmann ◽  
Dominik Zak ◽  
Joachim Audet ◽  
...  

Abstract Diffusive losses of nitrogen and phosphorus from agricultural areas have detrimental effects on freshwater and marine ecosystems. Mitigation measures treating drainage water before it enters streams hold a high potential for reducing nitrogen and phosphorus losses from agricultural areas. To achieve a better understanding of the opportunities and challenges characterising current and new drainage mitigation measures in oceanic and continental climates, we reviewed the nitrate and total phosphorus removal efficiency of: (i) free water surface constructed wetlands, (ii) denitrifying bioreactors, (iii) controlled drainage, (iv) saturated buffer zones and (v) integrated buffer zones. Our data analysis showed that the load of nitrate was substantially reduced by all five drainage mitigation measures, while they mainly acted as sinks of total phosphorus, but occasionally, also as sources. The various factors influencing performance, such as design, runoff characteristics and hydrology, differed in the studies, resulting in large variation in the reported removal efficiencies.


Author(s):  
C. V. Subramanian

Abstract A description is provided for Fusarium oxysporum f.sp. conglutinans. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Brassica oleracea (cabbage) and other Cruciferae: kale, Brussels sprouts, cauliflower, broccoli, kohlrabi, rutabaga, turnip, mustard, rape, Chinese cabbage, garden cress, stock, raddish. Armstrong & Armstrong (1952) consider the form infecting cabbage, raddish and stock as races of Fusarium conglutinans, however, Gordon (1965) recognizes these three as distinct formae speciales of Fusarium oxysporum, f.sp. conglutinans, f.sp. raphani Kendrick & Snyder and f.sp. mathioli Baker, respectively. DISEASES: Yellows of cabbage and other Cruciferae. GEOGRAPHICAL DISTRIBUTION: Africa (Congo, Cameroon, Rhodesia); Asia (China, Japan); Australasia (Australia, New Zealand); Europe (France, Netherlands, U.S.S.R.); N. America (U.S.A.); C. America and W. Indies (Cuba,? Trinidad); S. America (Brazil (Sao Paulo)) (CMI Map 54). TRANSMISSION: Soil-borne. Dissemination by means of soil on implements, transplants, surface drainage water and water-borne and wind-borne.


Author(s):  
C. V. Subramanian

Abstract A description is provided for Fusarium oxysporum f.sp. lycopersici. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Lycopersicon esculentum (tomato), L. pimpinellifolium (red currant tomato) and other species of Lycopersicon. DISEASE: Vascular wilt of tomato. GEOGRAPHICAL DISTRIBUTION: Africa, Asia, N. and S. America, Australasia, Europe, W. Indies and C. America. TRANSMISSION: Soil-borne and seed-borne. Long distance spread by infected seed and transplants. Local dissemination by transplants, wind-borne and water-borne infested soil, surface-drainage water.


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