scholarly journals Influence of EU policy on agricultural nutrient losses and the state of receiving surface waters in Finland

2008 ◽  
Vol 16 (4) ◽  
pp. 282 ◽  
Author(s):  
P. EKHOLM ◽  
K. GRANLUND ◽  
P. KAUPPILA
Keyword(s):  
Water Quality ◽  
Large Scale ◽  
Nutrient Loading ◽  
Nutrient Losses ◽  
Agricultural Catchments ◽  
Receiving Waters ◽  
Environmental Measures ◽  
Current Loading ◽  
Regional Specialisation

In Finland, the first large-scale efforts to control nutrient loading from agriculture got under way with the introduction of the EU Agri-Environmental Program in 1995. We examined whether these efforts have decreased agricultural nutrient losses and improved the quality of receiving waters. To do so we used monitoring data on fluxes of nutrients and total suspended solids in agricultural catchments in 1990–2004 and on the water quality of agriculturally loaded rivers, lakes and estuaries in 1990–2005. No clear reduction in loading or improvement in water quality was detected. Hydrological fluctuations do not seem to have eclipsed the effects of the measures taken, since there was no systematic pattern in runoff in the period studied. The apparent inefficiency of the measures taken may be due to the large nutrient reserves of the soil, which slowed down nutrient reductions within the period studied. Simultaneous changes in agricultural production (e.g. regional specialisation) and in climate may also have counteracted the effects of agri-environmental measures. The actions to reduce agricultural loading might have been more successful had they focused specifically on the areas and actions that contribute most to the current loading.;

Assessment on the Water Quality Influenced by Large-Scale Controlled Planting of Water Hyacinth in the Dianchi Lake

2013 ◽  
Vol 726-731 ◽  
pp. 1782-1785 ◽  
Author(s):  
Xia Zhang ◽  
Zong Shou Cai ◽  
Li Hong Chen ◽  
Jian Wen Ruan
Keyword(s):  
Water Quality ◽  
Ecological Restoration ◽  
Water Hyacinth ◽  
Large Scale ◽  
Present Situation ◽  
Dianchi Lake ◽  
The Future ◽  
Before And After ◽  
Ecological Treatment

Large-scale controlled planting of water hyacinth has become one of the most important measures of Dianchi Lake’s treatment in the “12th Five-Year Plan”. This paper firstly introduced the present situation of large-scale controlled planting of water hyacinth in Dianchi Lake. The water quality of Caohai and Waihai of Dianchi Lake were compared before and after the project of planting water hyacinth. This paper concluded that the effects of large-scale controlled planting of water hyacinth on the ecological restoration of Caohai lake were outstanding. The area of controlled planting could be spread among other water areas of Dianchi lake where is suitable for the growth of water hyacinth in the future, and water hyacinth will pay a greater role in the ecological treatment of Dianchi Lake.

scholarly journals An Assessment of Drinking Water Quality in Cauvery Delta Region and Palar Region, Tamil Nadu

2017 ◽  
Vol 3 (12) ◽  
pp. 238
Author(s):  
R. Sophia Porchelvi ◽  
P. Selvavathi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
River Basin ◽  
Tamil Nadu ◽  
Large Scale ◽  
Anthropogenic Activities ◽  
Small Scale ◽  
Drinking Purposes ◽  
Cauvery Delta

Delta regions of the Cauvery River basin are one of the significant areas of rice production in India. In spite of large-scale utilization of the river basin for irrigation and drinking purposes, the lack of appropriate water management has seemingly deteriorated the water quality due to increasing anthropogenic activities. Vellore is the second most populous district of Tamil Nadu in India where the Palar River flowing towards east for about 295 Km. Vellore is surrounded by many leather tanneries and small scale dying industries and their effluents are discharged into the Palar river causing impact on the quality of the underground water. To assess the extent of deterioration, physicochemical characteristics of surface water were analyzed select regions of Cauvery Delta River basin and Palar region, Tamil Nadu, during March 2016 to May 2016. This study aimed to examine quality of drinking groundwater. The results represented whether the water was suitable or unsuitable for drinking purposes in this area. It was also observed that some areas like Tiruvarur, Needamangalam, Kamalapuram, Arcot, Soraiyur, Ranipet had low quality drinking water. It is suggested to take some necessary measures for supplying desirable water to the people living in these areas.

The Influence of Large Scale Phosphate Mining on the Water Quality of the Huangbaihe River Basin in China: Dominant Pollutants and Spatial Distributions

2019 ◽  
Vol 38 (2) ◽  
pp. 366-377 ◽  
Author(s):  
Gebrehiwet Legese Reta ◽  
Xiaohua Dong ◽  
Bob Su ◽  
Xiaonong Hu ◽  
Huijuan Bo ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Large Scale ◽  
Spatial Distributions ◽  
Phosphate Mining

Calculation and Analysis of Water Quality Improvement Caused by Water Diversion in Nanjing Qinhuai River

2012 ◽  
Vol 256-259 ◽  
pp. 2528-2532
Author(s):  
Chao Feng Tong ◽  
Li Rui Lv ◽  
Yu Yang Shao ◽  
Jia Ling Hao
Keyword(s):  
Water Quality ◽  
Nutrient Loading ◽  
Water System ◽  
Water Diversion ◽  
Middle Reach ◽  
Quality Model ◽  
One Dimensional ◽  
The Impact ◽  
Qinhuai River

To explore the impact of changes in water quality of the Nanjing Inner Qinhuai River water system in different water diversion way and to assess the transfer effect, an one-dimensional hydrodynamic and water quality model for Inner Qinhuai River was established to simulate and analysis the responds of water quality on the different nutrient loading and different diverted water. Four different water discharges diverted from Xuanwu Lake and Exterior Qinhuai River and two loads including the present load and 50% reduction were considered. The result shows the water quality can be improved significantly only as enough water is diverted and the sewage is intercept in the Middle Reach of the Inner Qinhuai River.

scholarly journals Analysis of some aspects of water quality of Lake Naivasha

2017 ◽  
Vol 6 (1) ◽  
pp. 2001
Author(s):  
James Last Keyombe* ◽  
Edna Waithaka
Keyword(s):  
Water Quality ◽  
Physicochemical Parameters ◽  
Nutrient Loading ◽  
The Other ◽  
Lake Naivasha ◽  
Chemical Parameters ◽  
Dissolved Nutrients ◽  
Physico Chemical ◽  
Comparison Of The Results

In-depth analyses of physicochemical parameters and dissolved nutrients in Lake Naivasha was done during the dry (June 2014) and wet seasons (May and April 2016). A comparison of the results was made between the two seasons. Dissolved oxygen in Lake Naivasha was higher in comparison to other fresh water lakes within Kenya while relative stability was noted in the other physico-chemical parameters (pH, temperature and conductivity). Results also show that Lake Naivasha is phosphorus limited aquatic system with measurements ranging between 0.07 – 0.23 mg/l in March and 0.09 – 0.83 mg/l in April 2016. Nitrates ranged between 0.10 mg/l – 0.30 mg/l in March 2016 while in April no Nitrates were detected in the water samples. Sources of nutrient loading into the lake should be investigated and proper measure to be taken for sustainability of Lake Naivasha.

Widespread underestimation of the danger of groundwater contamination by shortcuts into aquifers

2020 ◽  
Author(s):  
Andreas Hartmann ◽  
The karst vulnerablity research consortium
Keyword(s):  
Water Quality ◽  
Groundwater Contamination ◽  
Large Scale ◽  
Scale Model ◽  
World Population ◽  
Continental Scale ◽  
Scale Modelling ◽  
Agricultural Pollutants ◽  
First Time

<p>Groundwater pollution threatens human and ecosystem health in many areas around the globe. Shortcuts to the groundwater through enlarged cracks and fissures, often referred to as concentrated recharge, are known to transmit short-lived pollutants into carbonate aquifers endangering water quality of around a quarter of the world population. However, the large-scale impact of concentrated recharge on water quality remains poorly understood. Here we apply a continental-scale model to quantify for the first time the danger of groundwater contamination by degradable pollutants through concentrated recharge in carbonate rock regions. We show that concentrated recharge is the primary reason for the rapid transport of contaminants to the groundwater, increasing the percentage of non-degraded pollutants from <1% in areas without concentrated recharge to around 20-50% in areas where concentrated recharge is present. Our findings are most pronounced in the Mediterranean region where agricultural pollutants in groundwater recharge like Glyphosate can exceed allowed concentrations by up to 19 times. Our results imply that in regions where shortcuts to the groundwater exist, continuing industrial agricultural productivity to optimize food production may result in a widespread reduction of available drinking water and harm ecosystem services more intense than presently available large-scale modelling concepts suggest.</p>

scholarly journals Influences of Large-Scale Flood on Water Quality of Tokyo Bay

2009 ◽  
Vol 65 (1) ◽  
pp. 1016-1020
Author(s):  
Yasuo NIHEI ◽  
Kentaro TAKIOKA ◽  
Ayako SAKAI ◽  
Kyosuke SHIGETA
Keyword(s):  
Water Quality ◽  
Large Scale ◽  
Tokyo Bay

scholarly journals Nutrient Load Mitigation with Wintertime Cover as Estimated by the INCA Model

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 450
Author(s):  
Katri Rankinen ◽  
Eila Turtola ◽  
Riitta Lemola ◽  
Martyn Futter ◽  
José Enrique Cano Bernal
Keyword(s):  
Vegetation Cover ◽  
Nutrient Loading ◽  
Plant Cover ◽  
Nature Management ◽  
Particulate Phosphorus ◽  
Catchment Scale ◽  
Total N ◽  
No Till ◽  
Receiving Waters ◽  
Environmental Measures

Increased nutrient loading causes deterioration of receiving surface waters in areas of intensive agriculture. While nitrate and particulate phosphorus load can be efficiently controlled by reducing tillage frequency and increasing vegetation cover, many field studies have shown simultaneously increased loading of bioavailable phosphorus. In the latest phase of the Rural Programme of EU agri-environmental measures, the highest potential to reduce the nutrient loading to receiving waters were the maximum limits for fertilization of arable crops and retaining plant cover on fields with, e.g., no-till methods and uncultivated nature management fields. Due to the latter two measures, the area of vegetation cover has increased since 1995, suggesting clear effects on nutrient loading in the catchment scale as well. We modeled the effectiveness of agri-environmental measures to reduce phosphorus and nitrogen loads to waters and additionally tested the performance of the dynamic, process-based INCA-P (Integrated Nutrients in Catchments—Phosphorus) model to simulate P dynamics in an agricultural catchment. We concluded that INCA-P was able to simulate both fast (immediate) and slow (non-immediate) processes that influence P loading from catchments. Based on our model simulations, it was also evident that no-till methods had increased bioavailable P load to receiving waters, even though total P and total N loading were reduced.

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