scholarly journals Role of forest ditching and agriculture on water quality: Connecting the long-term physico-chemical subsurface state of lakes with landscape and habitat structure information

2021 ◽  
pp. 151477
Author(s):  
Sari Holopainen ◽  
Aleksi Lehikoinen
Keyword(s):  
Water Quality ◽  
Habitat Structure ◽  
Structure Information ◽  
Physico Chemical

Dynamics of seepage mobile inventory in forest and agricultural soils - Results from a comparative multi-year lysimeter study

2020 ◽  
Author(s):  
Katharina Lehmann ◽  
Robert Lehmann ◽  
Kai Uwe Totsche
Keyword(s):  
Land Use ◽  
Agricultural Soils ◽  
Field Studies ◽  
Critical Zone ◽  
Soil Monitoring ◽  
Event Scale ◽  
Weather Events ◽  
Physico Chemical

<p>The mobile inventory in soil seepage is of fundamental importance for soil development and for functioning of subsurface ecosystem compartments. The mobile inventory may encompass inorganic, organo-mineral and organics, dissolved and colloidal, but also particulate matter and microbiota. Still unknown are the conditions and factors that trigger the release and export of seepage-contained mobile matter within soil, and its translocation through the subsurface of the critical zone. Long-term and high-resolution field studies that includes the mobile particulate inventory are essentially lacking. To overcome this knowledge gap, we established long-term soil monitoring plots in the Hainich Critical Zone Exploratory (HCZE; NW-Thuringia, central Germany). Soil seepage from 22 tension-supported lysimeters in topsoil and subsoil, covering different land use (forest, pasture, cropland) in the topographic recharge area of the HCZE, was collected and analyzed by a variety of analytical methods (physico-/chemical and spectroscopic) on a regular (biweekly) and event-scale cycle. With our study we proved that substances up to a size of 50 µm are mobile in the soils. The material spectra comprised minerals, mineral-organic particulates, diverse bioparticles and biotic detritus. Atmospheric forcing was found to be the major factor triggering the translocation of the mobile inventory. Especially episodic infiltration events during hydrological winter seasons (e.g. snow melts) with high seepage volume influences seepage hydrochemistry (e.g. pH, EC) and is important for transport of mobile matter to deeper compartments. Seasonal events cause mobilization of significant amounts of OC. On average, 21% of the total OC of the seepage was particulate (>0.45 µm). Furthermore, our results suggest that the formation environment and the geopedological setting (soil group, parent rock, land use) are controlling factors for the composition and the amount of soil-born mobile inventory. Our study provides evidence for the importance of the mobile inventory fraction >0,45 µm for soil element dynamics and budgets and highlights the role of weather events on soil and subsoil development and subsurface ecosystem functioning.</p>

scholarly journals Effects of long-term flooding on biogeochemistry and vegetation development in floodplains; a mesocosm experiment to study interacting effects of land use and water quality

2009 ◽  
Vol 6 (7) ◽  
pp. 1325-1339 ◽  
Author(s):  
A. M. Banach ◽  
K. Banach ◽  
R. C. J. H. Peters ◽  
R. H. M. Jansen ◽  
E. J. W. Visser ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Floodplain Wetlands ◽  
Vegetation Development ◽  
River Floodplains ◽  
Fertilized Soil ◽  
Agricultural Use ◽  
Effects Of Land Use

Abstract. Raising safety levees and reinforcing dykes is not a sufficient and sustainable solution to the intense winter and summer floods occurring with increasing frequency in Eastern Europe. An alternative, creating permanently flooded floodplain wetlands, requires improved understanding of ecological consequences. A 9 month mesocosm study (starting in January), under natural light and temperature conditions, was initiated to understand the role of previous land use (fertility intensity) and flooding water quality on soil biogeochemistry and vegetation development. Flooding resulted in severe eutrophication of both sediment pore water and surface water, particularly for more fertilized soil and sulphate pollution. Vegetation development was mainly determined by soil quality, resulting in a strong decline of most species from the highly fertilized location, especially in combination with higher nitrate and sulphate concentrations. Soils from the less fertilized location showed, in contrast, luxurious growth of target Carex species regardless water quality. The observed interacting effects of water quality and agricultural use are important in assessing the consequences of planned measures for ecosystem functioning and biodiversity in river floodplains.

Water quality changes in south-central Ontario lakes and the role of local factors in regulating lake response to regional stressors

2011 ◽  
Vol 68 (6) ◽  
pp. 1038-1050 ◽  
Author(s):  
Michelle E. Palmer ◽  
Norman D. Yan ◽  
Andrew M. Paterson ◽  
Robert E. Girard
Keyword(s):  
Water Quality ◽  
Acidic Deposition ◽  
Quality Parameters ◽  
Quality Changes ◽  
South Central ◽  
Chloride Water ◽  
Long Term Monitoring ◽  
Term Monitoring

The long-term monitoring of eight lakes near Dorset, Ontario, indicates that the water quality has changed significantly over the last 30 years. However, trends in the Dorset lakes may not be representative of changes in other south-central Ontario lakes, as the Dorset lakes are within a small area and span a limited gradient of lake and watershed characteristics. To determine the regional extent of water quality changes, we assessed the chemical changes in 36 diverse lakes that were first sampled between 1981 and 1990 and were resampled in 2004–2005. Similar to trends in the Dorset lakes, changes in the regional lakes included decreasing acidity, calcium, conductivity, metals, and phosphorus, and increasing dissolved organic carbon, nitrogen, sodium, and chloride. Water quality changes were driven by regional stressors, including acidic deposition, climate, and lakeshore residential development. However, stressor-induced responses differed among lakes. Increases in sodium and chloride were greater in developed lakes that were close to winter-maintained roads. Site-specific characteristics, such as lake and watershed morphometry, could not explain heterogeneous changes in the remaining water quality parameters. These results indicate that other factors play an important role in regulating individual lake response to regional stressors.

scholarly journals The role of biotic and abiotic components of the aquatic ecosystem in the formation of ecological trouble of Tsimlyansk and Manych reservoirs

2019 ◽  
Vol 46 (5) ◽  
pp. 544-554
Author(s):  
A. M. Nikanorov ◽  
T. A. Khoruzhaya
Keyword(s):  
Aquatic Ecosystem ◽  
Aquatic Ecosystems ◽  
Environmental Disaster ◽  
State Of Emergency ◽  
Chemical Indicators ◽  
Physico Chemical ◽  
State Of Water ◽  
Abiotic Component

The relative importance of indicators of biotic and abiotic components of aquatic ecosystems of Tsimlyansky and Manych (Proletarian and Veselovsky) reservoirs is investigated in the process of formation of States of ecological trouble: “environmental stress, environmental emergency and ecological disaster”, which are provided by a number of existing normative- methodological documents. For this purpose, the shares of indicators as a percentage of their total number in the dynamics of negative changes in aquatic ecosystems were compared on the basis of long-term monitoring information of Roshydromet and data of own expeditionary studies in reservoirs on hydrobiological, toxicological and physico-chemical indicators. It is established that the role of the biotic component increases with the deterioration of the aquatic ecosystem of the Tsimlyansk reservoir, on the contrary, decreases in Manych. The role of the abiotic component is great and similar in all reservoirs; it increases already in a state of emergency environmental situation, but in an environmental disaster is somewhat reduced. It is concluded that the proposed new approach to the analysis of the role of biotic and abiotic components in the development of negative changes in the ecosystem opens up new opportunities in the study of the water quality formation and the state of water bodies.

scholarly journals Temporal Changes of Water Quality Parameters in Rupa Lake and their Impact on Productivity

ZOO-Journal ◽  
2019 ◽  
Vol 5 ◽  
pp. 41-47
Author(s):  
Md. Akbal Husen ◽  
Ram P Dhakal ◽  
Agni P Nepal
Keyword(s):  
Water Quality ◽  
Nutrient Dynamics ◽  
Chemical Properties ◽  
Quality Parameters ◽  
Lake Productivity ◽  
Aquatic Biodiversity ◽  
Fish Yield ◽  
Physico Chemical ◽  
Physical And Chemical

Knowledge on nutrient dynamics of the lake provide basis for modality and extent of exploitation of fishery resources. Therefore, a long-term data of physico-chemical parameters was analyzed for the assessment of changing aquatic environment and its impact on aquatic biodiversity. The physical and chemical properties of water have been changed over 14 years (1994 to 2007). Increase in mean annual concentrations of dissolved oxygen in recent years (2002 to 2007) were recorded in the lake, which indicate improvement in water quality due to lake restoration. Annual mean pH levels were not consistent to produce specific trends. The pH of the water increased from 1994 to 2002, and then decreased continuously in later period. Water transparency increased with the decreased chlorophyll 'a' concentration during 1999 to 2002 due to degraded condition. The higher concentrations (0.010- 0.017 mgl-1) of soluble reactive phosphorous (SRP- PO4) were recorded during 1994 to 2000, later SRP concentration (0.003-0.012 mgl-1) tend to reduce. Effect of fluctuation in the physico-chemical properties on the lake productivity in terms of fish yield was assessed.

scholarly journals Influence of Reservoirs on the Concentration of Nutrients in the Water of Mountain Rivers

2016 ◽  
Vol 23 (3) ◽  
pp. 413-424 ◽  
Author(s):  
Małgorzata Kijowska-Strugała ◽  
Łukasz Wiejaczka ◽  
Rafał Kozłowski
Keyword(s):  
Water Quality ◽  
Nutrient Concentration ◽  
Hydrological Regime ◽  
Nutrient Content ◽  
Nutrient Concentrations ◽  
Mountain Rivers ◽  
Storage Reservoirs ◽  
Selection Of

Abstract The aim of the analysis was to demonstrate the role of reservoirs in shaping nutrient content (nitrates NO3- and phosphates PO43- as well as ammonia NH4+) in the waters of mountain rivers. Three Carpathian rivers with reservoirs in their courses were selected for the study: the Ropa River (Klimkowka reservoir), the Dunajec River (the Czorsztyn-Sromowce Wyzne reservoir complex) and the Raba River (Dobczyce reservoir). The basic criteria for the selection of the study objects for the investigation were: similar hydrological regime of the rivers and diverse parameters and functions of the storage reservoirs. The analysis of nutrient concentration was based on a long-term series of measurements (2004-2013). The reservoirs investigated generally contribute to an increase in nitrates in the rivers flowing below the reservoirs in particular months. The role of reservoirs in shaping phosphate and ammonia levels was not as evident as in the case of nitrates. The reservoirs are merely one of numerous factors that contribute to nutrient levels in the water of the mountains rivers. In the light of the analysis of nutrient concentrations in the surface water tested, it may be concluded that the reservoirs do not cause a clear and permanent deterioration of river water quality.

scholarly journals How to Enhance the Role of Science in European Union Policy Making and Implementation: The Case of Agricultural Impacts on Drinking Water Quality

Water ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 492 ◽  
Author(s):  
Matjaž Glavan ◽  
Špela Železnikar ◽  
Gerard Velthof ◽  
Sandra Boekhold ◽  
Sindre Langaas ◽  
...  
Keyword(s):  
Water Quality ◽  
European Union ◽  
Drinking Water ◽  
Policy Implementation ◽  
Policy Making ◽  
Drinking Water Quality ◽  
Agricultural Impacts ◽  
Eu Policy

Throughout the European Union (EU), high concentrations of nitrates and pesticides are among the major polluting components of drinking water and have potential long-term impacts on the environment and human health. Many research projects co-funded by the European Commission have been carried out, but the results often do not influence policy making and implementation to the extent that is duly justified. This paper assesses several issues and barriers that weaken the role of science in EU policy making and EU policy implementation in the case of agricultural impacts on drinking water quality. It then proposes improvements and solutions to strengthen the role of science in this process. The analysis is conceptual but supported empirically by a desk study, a workshop, and complementary individual interviews, mostly with representatives of organizations working at the EU level. The results indicate that perceived barriers are mostly observed on the national or regional level and are connected with a lack of political will, scarce instruction on the legislation implementation process, and a lack of funding opportunities for science to be included in policy making and further EU policy implementation. In response to that, we suggest translating scientific knowledge on technological, practical or environmental changes and using dissemination techniques for specific audiences and in local languages. Further, the relationship between data, information and decision making needs to change by implementing monitoring in real-time, which will allow for the quick adaptation of strategies. In addition, we suggest project clustering (science, policy, stakeholders, and citizens) to make science and research more connected to current policy challenges and stakeholder needs along with citizen involvement with an aim of establishing sustainable long-term relationships and communication flows.

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