A5047658287- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Fish Ecology and Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Peatlands and Wetlands Ecology
- Climate change impacts on agriculture
- Constructed Wetlands for Wastewater Treatment
- Hydrological Forecasting Using AI
- Integrated Water Resources Management
- Urban Stormwater Management Solutions
- Atmospheric and Environmental Gas Dynamics
- Coastal wetland ecosystem dynamics
- Marine and coastal ecosystems
- Water Quality and Pollution Assessment
- Precipitation Measurement and Analysis
Swedish University of Agricultural Sciences
2018-2024
Surface water eutrophication resulting from excessive phosphorus (P) inputs is one of today's most challenging environmental issues. Riverine total (TP) concentrations have high temporal variability, which complicates flux estimation. We evaluated the usefulness frequency in-situ turbidity measurements as a proxy for TP in Sävjaån, river draining mixed land use catchment (722 km2) central Sweden. Turbidity was monitored every 10th-15th minute during 6 consecutive years (2012-2017). Linear...
Climate change in combination with land use alterations may lead to significant changes soil erosion and sediment fluxes streams. Optical turbidity sensors can monitor high frequency be used as a proxy for suspended concentration (SSC) provided there is an acceptable calibration curve measured by SSC from water samples. This study such data 31 streams 11 different research projects or monitoring programmes six Northern European countries. The aim was find patterns the turbidity-SSC...
Abstract. Hydrological disturbances following storm events influence the structure and functioning of headwater streams. However, understanding how these impact critical processes such as stream metabolism is challenging. We assessed effect on resistance resilience gross primary production (GPP) ecosystem respiration (ER) in a heterotrophic stream. hypothesize will show low to because GPP ER be either enhanced by inputs limited resources (small storms) or hindered biofilm damage (large...
Abstract Streambed and lake sediment was studied in Sävjaån, a eutrophic mesoscale catchment (722 km 2 ) central Sweden. Triplicate cores from five lakes nine streams, ranging headwater to fourth order, were sampled. The analyzed with sequential extraction method, where six different phosphorus (P) fractions measured. results showed that streambed sediments store considerable amounts of P some cases have comparable contents (g/kg DW) sediment. Land use, soil type, drainage area (location the...
Historical accumulation of phosphorus (P) in lake sediment often contributes to and sustains eutrophic conditions lakes, even when external sources P are reduced. The most cost-effective commonly used method restore the balance between P-binding metals is aluminum (Al) treatment. binding efficiency Al, however, has varied greatly among treatments conducted over past five decades, resulting substantial differences amount bound per unit Al. We analyzed from seven previously Al treated Swedish...
Process-based models are commonly used to design management strategies reduce excessive algal growth and subsequent hypoxia. However, targets typically focus on phosphorus control, under the assumption that successful nutrient reduction will solve hypoxia issues. Algal responses drivers not linear depend additional biotic abiotic controls. In order generate a comprehensive assessment of effectiveness control strategies, independent nutrient, dissolved oxygen (DO), temperature must be...
Abstract Agriculture is a major source of sediment and particulate phosphorus (P) inputs to freshwaters. Distinguishing between P fractions in can aid understanding its eutrophication risk. Although streams rivers are important parts the cycle agricultural catchments, streambed especially fluvial suspended (FSS) less studied. To address this knowledge gap, seasonal variations FSS their relation water quality were examined three Swedish headwater catchments over 2 yr. Sequential fractionation...
Globally, significant societal resources are devoted to mitigating negative effects of eutrophication from excessive phosphorus (P) and nitrogen (N) loading. Potential effectiveness mitigation measures possible confounding factors often assessed using studies conducted in headwater catchments. However, success is evaluated based on trends river mouth water chemistry. It not clear how transferrable insights catchments larger rivers. Here, relationships between P suspended solids (SS)...
High-frequency (HF) in situ sensor data capture temporal water quality variability. Using HF to calibrate catchment-scale models remains uncommon, despite previous studies demonstrating the value of reducing uncertainty model output. This study aims provide new insights regarding use proxy [turbidity as a for total phosphorus (TP) and suspended solids (TSS)] compared low-frequency (LF) calibration. Four calibration sets were used model: monthly grab samples TSS TP turbidity proxies TP, alone...
Abstract In‐situ sensors for riverine water quality monitoring are a powerful tool to describe temporal variations when efficient and informative analyses applied the large quantities of data collected. Concentration‐discharge hysteresis patterns observed during storm events give insights into headwater catchment processes. However, applicability this approach larger catchments is less well known. Here, we evaluate potential high‐frequency turbidity‐discharge (Q) processes operating in...
Boreal watercourses are large emitters of carbon dioxide (CO 2 ) to the atmosphere. For forestry intensive areas Nordic and Baltic countries, a high share these man-made ditches, created improve drainage increase forest productivity. Previous studies have suggested that terrestrial sources sustain CO in ditches variability hydrology is main temporal control. However, few explored ditch dynamics its associated controls catchments being exposed harvest. An altered hydrology, increased nutrient...
For more than 50 years, aluminum (Al)-salts have been used with varying degrees of success to inactivate excess mobile phosphorus (P) in lake sediments and restore water quality. Here, we analyzed the factors influencing effectiveness longevity Al-treatments performed six Swedish lakes over past 25 years. Trends post-treatment measurements total (TP), Chlorophyll a (Chl_a), Secchi disk depth (SD) internal P loading rates (Li) were compared pre-treatment conditions. All measured quality...