Delay in lake recovery caused by internal loading

Rossi, Giovanni; Guido, Premazzi

doi:10.1016/0043-1354(91)90129-e

Cited by 62 publications

(27 citation statements)

References 2 publications

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“…Cyclical changes in oxygen concentration in water depend on the season. They are also determined by the trophy observed in a given ecosystem [2,5,10,15,33,34]. Researchers agree with those fi ndings and emphasize the importance of the oxygen balance for the limnic ecosystem effi ciency [4,5,6,13,19].…”

Section: Introductionsupporting

confidence: 64%

“…The reservoir has a littoral zone area smaller than the pelagic one and hence is classifi ed as type III according to Dołgoff [3]. As the water time retention amounts to 2-2.5 years, it is classifi ed, according to Starmach [34], as extremely limnic. The fi rst research into the thermic-oxygen conditions and basic physical and chemical water quality factors [8,9] was carried out in 1976, a year after the borrow pit had been fi lled.…”

Section: Methodsmentioning

confidence: 99%

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Changes in Oxygen Conditions in Pławniowice Reservoir as a Result of Restoration with Hypolimnetic Withdrawal Method

Kostecki¹

2014

Archives of Environmental Protection

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Abstract:The restoration of the anthropogenic Pławniowice water reservoir with the hypolimnion withdrawal method (the Olszewski's tube) began in December 2003. The decision to restore the reservoir had been taken due to its terrible condition resulting from the hypertrophy, which had been indicated by the research from the years 1993-1998.The following paper presents the results of eight-year-long research into the formation of oxygen conditions and restoration settings. They were compared with the data obtained from the research before the restoration. Positive changes were witnessed. It was showed that grasping the changes in oxygen conditions enables the comparison of oxygen profi les in the same months in subsequent years. The ratio of anoxic water layer thickness to the oxygenated layer thickness was suggested as a factor characterizing oxygen conditions. The area described with an izooxa in the xy coordinate system was suggested as a factor [O 2 mg /m 2 ] allowing researchers to understand and describe occurring changes. It was observed that the oxygen solved in water as a result of the restoration occurred in the whole water column in the third decade of July. The oxygen concentration in the hypolimnion gradually rose in May, June and July each year. It was showed that the improvement in oxygen conditions stemmed from progressing oligotrophy of the reservoir.

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Section: Introductionsupporting

confidence: 64%

Section: Methodsmentioning

confidence: 99%

Changes in Oxygen Conditions in Pławniowice Reservoir as a Result of Restoration with Hypolimnetic Withdrawal Method

Kostecki¹

2014

Archives of Environmental Protection

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“…This source of nutrients is a major contributor to phosphorus concentration in the water column, as well as lake trophic status (Nürnberg 1988, Marsden 1989, Boström et al 1982. The difference between external nutrient load reductions and expected declines in water column total phosphorus (TP) levels is, in some instances, due to supply of phosphorus from the sediments to the water column (Sas 1989, Rossi andPremazzi 1991). This source of phosphorus should be considered when constructing whole-lake nutrient budgets in order to explain lake trophic status trajectory following external nutrient load reductions or other lake restoration projects.…”

mentioning

confidence: 99%

Internal Nutrient Loads from Sediments in a Shallow, Subtropical Lake

Fisher

Reddy

James

2005

Lake and Reservoir Management

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“…沉积物与上覆水中磷的源、汇关系可相互转化, 因此即使外源磷得到有效的控制, 沉积物中磷的重新释放仍然可以使水中磷浓度维持较高的水平 [5] , 沉积物中不同形态磷的迁移转化规律及其影响因子各不相同, 从而使湖泊水体修复难度大增. 化学连续提取法是湖泊沉积物中磷形态分离的重要手段 [6][7] , 对于研究沉积物中不同形态磷的迁移转化具有重要的意义.…”

Section: J Lake Sci(湖泊科学) 2008 20(3) 316unclassified

Availability and transferring of phosphorus forms by Hydrilla verticillata in the sediment and soil

Zhao¹,

Wang²,

Jin³

et al. 2008

Journal of Lake Sciences

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Availability of phosphorus forms of submerged plant in the sediment and soil has been studied using the submerged plant Hydrilla verticillata culturing in different trophic sediments and soil. Different phosphorus forms in sediments and soil were separated by the chemical sequential extraction methods, at the same time the biomass of Hydrilla verticillata, concentrations of phosphorus in overlying water and in interstitial water were also analyzed. Amount of the bioavailable particular phosphorus was estimated by the formula of age available particular phosphorus. The results showed that labile phosphorus (P) and reducible soluble phosphorus (RSP) were the main phosphorus forms for Hydrilla verticillata utilization. The sediment is beneficial for the growth and fade of Hydrilla verticillata at the growth early stage. Phosphorus concentrations of the overlying water and interstitial water were affected mainly by the RSP concentrations in sediments. Phosphorus concentrations of interstitial water in soil were affected mainly by its labile P concentrations. The submerged plant Hydrilla verticillata promoted available phosphorus transforming, and its utilization rate for available particular phosphorus in soil is lower than that in sediments.

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Delay in lake recovery caused by internal loading

Cited by 62 publications

References 2 publications

Changes in Oxygen Conditions in Pławniowice Reservoir as a Result of Restoration with Hypolimnetic Withdrawal Method

Changes in Oxygen Conditions in Pławniowice Reservoir as a Result of Restoration with Hypolimnetic Withdrawal Method

Internal Nutrient Loads from Sediments in a Shallow, Subtropical Lake

Availability and transferring of phosphorus forms by Hydrilla verticillata in the sediment and soil

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