Mobilisation of N and P from Agricultural Land and its Impact on Stream Water Quality in Karst Hilly Areas, Southwestern China

2013 ◽  
Vol 295-298 ◽  
pp. 2148-2151
Author(s):  
Fang Liu ◽  
Jian Zhu ◽  
Hai Bo Luo ◽  
Yuan Sheng Liu
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Agricultural Land ◽  
Stream Water ◽  
Surface Water Quality ◽  
Guizhou Province ◽  
Agricultural Lands ◽  
Stream Water Quality ◽  
High Concentration ◽  
Stream Waters

In order to evaluate the impacts of N and P mobility from agricultural soils on surface water quality, the dissolved N and P concentrations in the runoff, the drainage and stream waters nearby agricultural lands were investigated at the karst hilly regions in central Guizhou Province. The results shown that the concentrations of NO3−, NH4+ and PO43− in the runoff from upland soils were 9.8~22.1 mg L−1, 0.429~0.818 mg L−1 and 0.025~0.052 mg L−1, respectively, and higher concentrations of NO3− (14.5~25.3 mg L−1) in the drainage waters from paddy soils. In karst areas, the concentrations of NO3− in the stream waters nearby agricultural lands was 14.9~28.5 mg L−1, as indicated by high concentration of NO3− compared with the Grade III of Surface Water Quality Standard of China, suggesting a eutrophication problem for surface water nearby agricultural lands with intensive cultivation.

Mobility of N and P in Phosphogypsum Pile and its Impact on Surface Water Quality in Guizhou Province, Southwestern China

2012 ◽  
Vol 610-613 ◽  
pp. 2096-2099
Author(s):  
Hai Bo Luo ◽  
Fang Liu ◽  
Jian Zhu ◽  
Quan An
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Phosphoric Acid ◽  
Surface Water Quality ◽  
Guizhou Province ◽  
Acid Plant ◽  
River Waters ◽  
High Concentrations ◽  
Stream Waters ◽  
Drainage Waters

In order to evaluate the impacts of N and P mobility from phophogypsum on surface water quality, the dissolved N and P concentrations in the drainage and river waters nearby phophogypsum piles were investigated at the phosphoric acid plant regions in central Guizhou Province, and batch leaching tests for the phophogypsum was performed. The results shown that the concentrations of NH4+ and PO43− in leachate solutions from phophogypsum were 0.325~0.587 mg L−1 and 148.6~266.0 mg L−1, respectively, and higher concentrations of NH4+ (2.86~8.02 mg L−1) and PO43− (201.9~1195.6 mg L−1) in the drainage waters from phophogypsum pile. In phosphoric acid plant areas, the concentrations of NH4+ and PO43− in the stream waters nearby phophogypsum piles were 0.96~2.36 mg L−1 and 1.26~4.89 mg L−1, respectively, as indicated by high concentrations of NH4+ and PO43−, suggesting a eutrophication problem for surface water nearby phophogypsum piles in those areas.

Baseflow contribution to nitrates in an urban stream in Daejeon, Korea

2010 ◽  
Vol 61 (12) ◽  
pp. 3216-3220 ◽  
Author(s):  
G. Kim ◽  
H. Lee ◽  
Y. Lim ◽  
M. Jung ◽  
D. Kong
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Groundwater Quality ◽  
Stream Water ◽  
Surface Water Quality ◽  
Quality Data ◽  
Urban Stream ◽  
Hydrograph Separation ◽  
Stream Water Quality ◽  
The Impact

It is a well-known fact that baseflow discharge of rainfall runoff significantly impacts the quality of surface water. In this paper, the impact of nitrates discharged as baseflow on stream water quality were studied using PULSE, a hydrograph separation software developed by USGS, to calculate the monthly baseflow discharge. We took water quality and flow rate data from a monitoring station site (code: Ghapcehon2) in Daejeon city and acquired 2005 groundwater quality data in the watershed from government agencies. Agricultural and forestry land use are dominant in the area. The baseflow contributes 85%–95% of stream flows during the spring and fall, 25%–38% during the summer and winter. The monthly nitrate loading discharged as baseflow for Ghapcheon2 was estimated by using monitored nitrate concentrations of groundwater in the watershed. Nitrate loading induced by baseflow at Ghapcheon2 was estimated as 5.4 tons of NO3−-N/km2, which is about 60% of nitrate loading of surface water, or 9.2 tons of NO3−-N/km2. This study shows that groundwater quality monitoring is important for proper management of surface water quality.

scholarly journals MECHANISMS CONTROLLING SURFACE WATER QUALITY IN THE COBRAS RIVER SUB-BASIN, NORTHEASTERN BRAZIL

2017 ◽  
Vol 30 (1) ◽  
pp. 181-189 ◽  
Author(s):  
ALEXANDRE DE OLIVEIRA LIMA ◽  
◽  
FRANCISCO PINHEIRO LIMA-FILHO ◽  
NILDO DA SILVA DIAS ◽  
PRISCILA REGINA DO ARAGÃO REGO ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Colloidal Particles ◽  
Stream Water ◽  
Surface Water Quality ◽  
Northeastern Brazil ◽  
Anthropogenic Sources ◽  
Stream Water Quality ◽  
Seasonal Behavior ◽  
Organic Sediment

ABSTRACT Stream water quality is dependent on many factors, including the source and quantity of the streamflow and the types of geology and soil along the path of the stream. This study aims to evaluate the origin and the mechanisms controlling the input of ions that effect surface water quality in the sub -basin of the Rio das Cobras, Rio Grande do Norte state, Northeastern Brazil. Thirteen ponds were identified for study: three in the main river and ten in the tributaries between, thus covering the whole area and lithology of the sub -basin. The samples were collected at two different times (late dry and rainy periods) in the hydrological years 2009 and 2010, equating to total of four collection times. We analyzed the spatial and seasonal behavior of water quality in the sub-basin, using Piper diagrams, and analyzed the source of the ions using Guibbs diagram and molar ratios. With respect to ions, we found that water predominate in 82% sodium and 76% bicarbonate water (cations and anions, respectively). The main salinity control mechanism was related to the interaction of the colloidal particles (minerals and organic sediment) with the ions dissolved in water. Based on the analysis of nitrates and nitrites there was no evidence of contamination from anthropogenic sources.

scholarly journals Spring and surface water quality of the Cyprus ophiolites

2002 ◽  
Vol 6 (5) ◽  
pp. 797-817 ◽  
Author(s):  
C. Neal ◽  
P. Shand
Keyword(s):  
Water Quality ◽  
Sea Water ◽  
Stream Water ◽  
Chemical Reactivity ◽  
Surface Water Quality ◽  
Calcium Sulphate ◽  
Stream Water Quality ◽  
Troodos Ophiolite ◽  
High Calcium ◽  
Hydrolysis Of

Abstract. A survey of surface, spring and borehole waters associated with the ophiolite rocks of Cyprus shows five broad water types (1) Mg-HCO3, (2) Na-SO4-Cl-HCO3, (3) Na-Ca-Cl-SO4-OH-CO3, (4) Na-Cl-SO4 and (5) Ca-SO4. The waters represent a progression in chemical reactivity from surface waters that evolve within a groundwater setting due to hydrolysis of the basic/ultrabasic rock as modified by CO2-weathering. An increase in salinity is also observed which is due to mixing with a saline end-member (modified sea-water) and dissolution of gypsum/anhydrite. In some cases, the waters have pH values greater than 11. Such high values are associated with low temperature serpentinisation reactions. The system is a net sink for CO2. This feature is related not only to the hydrolysis of the primary minerals in the rock, but also to CaCO3 or Ca-Mg-CO3 solubility controls. Under hyperalkaline conditions, virtually all the carbon dioxide is lost from the water due to the sufficiently high calcium levels and carbonate buffering is then insignificant. Calcium sulphate solubility controls may also be operative when calcium and sulphate concentrations are particularly high. Keywords: Cyprus, Troodos, ophiolite, serpentinisation, spring, stream, water quality, bromide, iodine, boron, trace elements, hyperalkaline.

Variabilities of Surface Water Quality of Degraded Post-mining Areas in Bytom

2021 ◽  
Vol 23 ◽  
pp. 318-331
Author(s):  
Aleksandra Czajkowska ◽  
Łukasz Gawor
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Ph Value ◽  
Surface Water Quality ◽  
Water Hardness ◽  
Total Content ◽  
Mining Area ◽  
Physicochemical Analysis ◽  
High Concentration ◽  
Mining Areas

In the paper there is presented an evaluation of variability of surface water quality (reservoirs and watercourses), on the area of degraded post-mining area in Bytom. The physicochemical analysis of water and compared with archival data obtained in 2009 and 2014. There were done analysis of following parameters: reaction, total content of substances dissolved in water, water hardness and the content of: Cl-, SO42-, HCO3-, Ca2+, Mg2+, K+, Na+, NH4+, NO3-, NO2-, PO4- ions as well as Fe and Mn. The examined surface waters were characterised by high content of solutes. Anions were dominated by chlorides, the sodium proved to be the dominating cation, the examined water samples were characterised by high concentration of sulphates. In all analyzed reservoirs, permissible concentrations of chlorides and sulphates were exceeded. In all sample points there was observed a decrease of pH value in long term period, the concentration of chlorides lowered, however concentrations of sulphates increased in the majority of sampling points.

scholarly journals Modelling Impacts of a Municipal Spatial Plan of Land-Use Changes on Surface Water Quality—Example from Goriška Brda in Slovenia

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 189 ◽  
Author(s):  
Matjaž Glavan ◽  
Sara Bele ◽  
Miha Curk ◽  
Marina Pintar
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Surface Water ◽  
Land Use Change ◽  
Agricultural Land ◽  
Surface Water Quality ◽  
Erosion Processes ◽  
Phosphorus Loads ◽  
The Impact ◽  
Spatial Plan

Intensive agriculture causes nutrient leaching and accelerates erosion processes, which threatens the good quality status of surface waters, as proposed by the European Union (EU) Water Framework Directive. The purpose of this study was to define the impact of two alternative agricultural land-use change scenarios defined in a Municipal Spatial Plan on surface water quality by using the Agricultural Policy/Environmental eXtender (APEX) model. As experimental area, we chose a small Kožbanjšček stream catchment (1464 ha) situated in the Goriška Brda region in Slovenia. The area, due to favorable conditions for vineyards, is facing increasing deforestation. The change of 66.3 ha of forests to vineyards would increase the sediment, nitrate, and phosphorus loads in the stream by 24.8%, 17.1%, and 10.7%, respectively. With the implementation of vegetative buffer strips as a mitigation measure of the current situation, we could reduce the sediment, nitrate, and phosphorus loads by 17.9%, 11.1%, and 3.1%, respectively, while a combination of the two land-use change scenarios would result in a slight increase of the above-mentioned loads, corresponding to 0.61%, 2.1%, and 6.6%, respectively, compared to the baseline situation. The results confirm that, as we can increase pollution levels with deforestation, we can also reduce water pollution by choosing proper types of land management measures.

scholarly journals Ecological status of surface water of the river Stokhid basin

2017 ◽  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Agricultural Land ◽  
Spatial Dynamics ◽  
Ecological Status ◽  
Surface Water Quality ◽  
Treated Wastewater ◽  
Clean Water ◽  
Environmental Indices ◽  
The Village

Purpose. The analysis of the surface water quality of the Stokhid river, the definition of the class and the category of water quality. Methods. Comparative geographic, analytical, generalization and systematization. Results. Inner annual dynamics of the components of the hydro chemical conditions of surface water composition is closely linked with river runoff, the formation of which occurs due to loss of precipitation and nutrition of groundwater. Based on the analysis of monitoring observations, carried out by the State Environmental Inspectorate in the Volyn region for the period from 2007 to 2017, it has been determined the multi-year time and spatial dynamics of the average annual values of integrated environmental indices by the average values. They are following: in the village Malinovka IEaver. = 2,2 and in Lyubeshiv village IE aver. = 2,4. The water of river Stokhid belongs to the second class of quality ("good", "pure"), to the second category ("very good", "very pure") and subcategories 2 (3) ("very good", " clean" water with a tendency to approach the category of "good", "fairly clean") respectively. Dynamics of average annual values of integral ecological indexes for the worst values in village Malinovka IEworst = 2,6 and in the village Lyubeshiv IEworst = 2,8 was characterized by water of the second class ("good", "pure"), third category ("good", "fairly clean"), subcategory 2-3 (water transitions in quality from "very good", "pure" to "good", "fairly clean") and subcategory 3 (2) ("good", "fairly clean" water with a bias to "very good", "clean"). Conclusions. In general, it should be noticed, that when calculating the values of integral ecological indexes, the value of the indexes of trophic and sapro-biological indicators are the worst. Compounds of Nitrogen was among the substances that determined the water quality as "very poor" and "very dirty". Increased levels of Nitrogen compounds in the Stokhid river is mainly due to the intake of insufficiently treated wastewater, surface runoff from agricultural land and the decomposition of non-living organic matter in the spring.

scholarly journals Surface Water Quality of Intensive Farming Areas Within the Santa Lucia River Basin of Uruguay

2017 ◽  
Vol 10 ◽  
pp. 117862211771544 ◽  
Author(s):  
Patricia Barreto ◽  
Santiago Dogliotti ◽  
Carlos Perdomo
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
River Basin ◽  
Total Phosphorus ◽  
Agricultural Land ◽  
Surface Water Quality ◽  
Human Consumption ◽  
Nitrogen And Phosphorus ◽  
Intensive Farming ◽  
Agricultural Use

The Santa Lucia River basin provides drinking water to 60% of Uruguay population. The input of excessive amounts of nitrogen and phosphorus both from point and nonpoint sources could impair surface water quality and prevent its use for human consumption. The objective of this work was to evaluate surface water quality in small catchments under agricultural use located within this river basin. To this end, 5 streams and 4 small polders were surveyed between September 2008 and December 2009. The median concentrations of total phosphorus and total nitrogen in the streams across all sites and periods were 770 and 1659 µg L−1, respectively, exceeding in the case of total phosphorus national and international thresholds. Furthermore, soluble phosphorous, the most readily available form to algae, represented 88.3% of total phosphorus. Concentrations of phosphorous and nitrogen in polders were also high. The eutrophication process of this water bodies could be linked to the intensive agricultural land use in the area because the nutrient input from cities and industries was not relevant in these catchments.

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