Excessive Phosphorus Loading to Dal Lake, India: Implications for Managing Shallow Eutrophic Lakes in Urbanized Watersheds

2008 ◽  
Vol 93 (2) ◽  
pp. 148-166 ◽  
Author(s):  
Sabah Ul Solim ◽  
Ashwani Wanganeo
Keyword(s):  
Phosphorus Loading ◽  
Eutrophic Lakes ◽  
Dal Lake

Contrasting effects and mode of dredging and in situ adsorbent amendment for the control of sediment internal phosphorus loading in eutrophic lakes

2021 ◽  
Vol 189 ◽  
pp. 116644
Author(s):  
Hongbin Yin ◽  
Chunhui Yang ◽  
Pan Yang ◽  
Anna H Kaksonen ◽  
Grant B. Douglas
Keyword(s):  
Phosphorus Loading ◽  
Eutrophic Lakes ◽  
Internal Phosphorus Loading

scholarly journals Optimization of aluminum treatment efficiency to control internal phosphorus loading in eutrophic lakes

2020 ◽  
Vol 185 ◽  
pp. 116150 ◽  
Author(s):  
O. Agstam-Norlin ◽  
E.E. Lannergård ◽  
M.N. Futter ◽  
B.J. Huser
Keyword(s):  
Phosphorus Loading ◽  
Treatment Efficiency ◽  
Eutrophic Lakes ◽  
Internal Phosphorus Loading

Persistent internal phosphorus loading during summer in shallow eutrophic lakes

Hydrobiologia ◽  
2012 ◽  
Vol 710 (1) ◽  
pp. 95-107 ◽  
Author(s):  
Martin Søndergaard ◽  
Rikke Bjerring ◽  
Erik Jeppesen
Keyword(s):  
Phosphorus Loading ◽  
Eutrophic Lakes ◽  
Internal Phosphorus Loading

The Contribution of Agricultural Loading to Eutrophication in Finnish Lakes

1985 ◽  
Vol 17 (6-7) ◽  
pp. 1133-1140 ◽  
Author(s):  
L. Kauppi
Keyword(s):  
Algal Growth ◽  
Industrial Effluents ◽  
Agricultural Runoff ◽  
Total Surface Area ◽  
Ionic Concentration ◽  
Phosphorus Loading ◽  
Available Phosphorus ◽  
Agricultural Activity ◽  
Nineteen Seventies ◽  
Spring Maximum

Agriculture accounts for 9 per cent of the total surface area of Finland and generates the greatest single nutrient input to Finnish watercourses. Since agricultural activity is scattered throughout the whole country its effects in lakes are less pronounced than those of domestic and industrial effluents. On the other hand, point source phosphorus loading of lakes and rivers decreased significantly during the nineteen-seventies. Phosphorus is the nutrient which primarily limits production in most Finnish lakes. The availability of phosphorus in agricultural runoff waters is therefore a crucial question in the evaluation of the eutrophicating effects of agriculture. Our results indicated that in runoff waters available phosphorus can be 60-70 per cent of the total phosphorus. However, the concentrations of available P were so low that they could be achieved in Finnish lakes of low ionic concentration through simple chemical desorption without the assistance of the algal uptake. The utilization of the spring maximum of runoff phosphorus in lakes would thus not depend on the concurrence of the maxima of loading and algal growth.

Long-Term (15 Years) Results of NPS Controls in an Agricultural Watershed upon a Receiving Lake's Water Quality

1993 ◽  
Vol 28 (3-5) ◽  
pp. 441-449 ◽  
Author(s):  
Paul J. Garrison ◽  
Timothy R. Asplund
Keyword(s):  
Water Quality ◽  
Structural Changes ◽  
Soil Phosphorus ◽  
Water Clarity ◽  
Management Control ◽  
Agricultural Watershed ◽  
Control Measures ◽  
Phosphorus Loading ◽  
Phosphorus Concentration ◽  
White Clay

Nonpoint source controls were installed in a 1215 ha agricultural watershed in northeastern Wisconsin in the late 1970. Changes were made in handling of animal wastes and cropping practices to reduce runoff of sediment and nutrients. Modelling results predicted a reduction in phosphorus runoff of 30 percent. The water quality of White Clay Lake has worsened since the installation of NPS controls. The lake's phosphorus concentration has increased from a mean of 29 µg L−1 in the late 1970s to 44 µg L−1 in recent years. Water clarity has declined from 2.7 to 2.1 m and the mean summer chlorophyll levels have increased from 9 to 13 µg L−1 with peak values exceeding 40 µg L−1. Increased phosphorus loading is not the result of elevated precipitation but instead the failure of the control measures to sufficiently reduce P loading. Most of the effort was placed on structural changes while most of the P loading comes from cropland runoff. Further, soil phosphorus concentrations have increased because of artificial fertilizers and manure spreading. The White Clay Lake experience is discouraging since the majority of the polluters in this watershed utilized some NPS control practices, including 76 percent of the farms which installed waste management control facilities.

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