scholarly journals Spatial patterns of water quality impairments from point source nutrient loads in Germany's largest national River Basin (Weser River)

2019 ◽  
Vol 697 ◽  
pp. 134145 ◽  
Author(s):  
Soohyun Yang ◽  
Olaf Büttner ◽  
Rohini Kumar ◽  
Christoph Jäger ◽  
James W. Jawitz ◽  
...  
Keyword(s):  
Water Quality ◽  
Point Source ◽  
River Basin ◽  
Spatial Patterns ◽  
Nutrient Loads

scholarly journals Study on the Causes of Water Environmental Pollution of Important Rivers in Haihe River Basin and Countermeasures

2021 ◽  
Vol 261 ◽  
pp. 04023
Author(s):  
Xu He ◽  
Hou Siyan
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Environmental Pollution ◽  
River Basin ◽  
River Regulation ◽  
Haihe River Basin ◽  
Point Source Pollution ◽  
Haihe River ◽  
The Impact

The water quality of six important rivers in Haihe River Basin, including Yongding River, Luanhe River, North Canal, Daqing River, South Canal and Chaobai River, was evaluated. The influence of point source and non-point source on water quality was analyzed. The causes of water environmental pollution in the major rivers were preliminarily revealed. The results show that the water quality of Chaobai River is good, and the impact of point source and non-point source discharge on the water body is small. Other rivers are affected by different degrees of point source and non-point source pollution. Based on the analysis results, the engineering measures and management countermeasures for river regulation are put forward.

Water quality monitoring: the basis for watershed management in the Oldman River Basin, Canada

2006 ◽  
Vol 53 (10) ◽  
pp. 153-161 ◽  
Author(s):  
C.W. Koning ◽  
K.A. Saffran ◽  
J.L. Little ◽  
L. Fent
Keyword(s):  
Water Quality ◽  
Point Source ◽  
River Basin ◽  
Watershed Management ◽  
Health Concern ◽  
Quality Data ◽  
Oil And Gas Development ◽  
Water Quality Data ◽  
Oldman River Basin ◽  
Oldman River

The Oldman River flows 440 km from its headwaters in south-western Alberta, through mountains, foothills and plains into the South Saskatchewan River. Peak flows occur in May and June. Three major reservoirs, together with more than a dozen other structures, supply water to nine irrigation districts and other water users in the Oldman basin. Human activity in the basin includes forestry, recreation, oil and gas development, and agriculture, including a large number of confined livestock feeding operations. Based on the perception of basin residents that water quality was declining and of human health concern, the Oldman River Basin Water Quality Initiative was formed in 1997 to address the concerns. There was limited factual information, and at the time there was a desire for finger pointing. Results (1998–2002) show that mainstem water quality remains good whereas tributary water quality is more of a challenge. Key variables of concern are nutrients, bacteria and pesticides. Point source discharges are better understood and better regulated, whereas non-point source runoff requires more attention. Recent data on Cryptosporidium and Giardia species are providing benefit for focusing watershed management activities. The water quality data collected is providing a foundation to implement community-supported urban and rural better management practices to improve water quality.

Spatial Patterns of Water Quality in the Cuiabá River Basin, Central Brazil

2006 ◽  
Vol 123 (1-3) ◽  
pp. 41-62 ◽  
Author(s):  
Peter Zeilhofer ◽  
Eliana Beatriz Nunes Rondon Lima ◽  
Gilson Alberto Rosa Lima
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Spatial Patterns ◽  
Central Brazil

scholarly journals Spatial patterns of water quality in Xingu River Basin (Amazonia) prior to the Belo Monte dam impoundment

2015 ◽  
Vol 75 (3 suppl 1) ◽  
pp. 34-46 ◽  
Author(s):  
JL. Rodrigues-Filho ◽  
DS. Abe ◽  
P. Gatti-Junior ◽  
GR. Medeiros ◽  
RM. Degani ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Spatial Patterns ◽  
Amazon Basin ◽  
Environmental Changes ◽  
Anthropogenic Activities ◽  
Data Sampling ◽  
Anthropogenic Pressures ◽  
Xingu River ◽  
Belo Monte

Abstract The Xingu River, one of the most important of the Amazon Basin, is characterized by clear and transparent waters that drain a 509.685 km2 watershed with distinct hydrological and ecological conditions and anthropogenic pressures along its course. As in other basins of the Amazon system, studies in the Xingu are scarce. Furthermore, the eminent construction of the Belo Monte for hydropower production, which will alter the environmental conditions in the basin in its lower middle portion, denotes high importance of studies that generate relevant information that may subsidize a more balanced and equitable development in the Amazon region. Thus, the aim of this study was to analyze the water quality in the Xingu River and its tributaries focusing on spatial patterns by the use of multivariate statistical techniques, identifying which water quality parameters were more important for the environmental changes in the watershed. Data sampling were carried out during two complete hydrological cycles in twenty-five sampling stations. The data of twenty seven variables were analyzed by Spearman's correlation coefficients, cluster analysis (CA), and principal component analysis (PCA). The results showed a high auto-correlation between variables (> 0.7). These variables were removed from multivariate analyzes because they provided redundant information about the environment. The CA resulted in the formation of six clusters, which were clearly observed in the PCA and were characterized by different water quality. The statistical results allowed to identify a high spatial variation in the water quality, which were related to specific features of the environment, different uses, influences of anthropogenic activities and geochemical characteristics of the drained basins. It was also demonstrated that most of the sampling stations in the Xingu River basin showed good water quality, due to the absence of local impacts and high power of depuration of the river itself.

Consequences of diffuse pollution on the water quality of rivers in the watershed of the lagoon of Venice (Italy)

1999 ◽  
Vol 39 (3) ◽  
pp. 113-120 ◽  
Author(s):  
G. Bendoricchio ◽  
L. Calligaro ◽  
G. M. Carrer
Keyword(s):  
Water Quality ◽  
Point Source ◽  
Nitrogen Concentration ◽  
Monitoring Program ◽  
Diffuse Pollution ◽  
Nutrient Concentrations ◽  
Nutrient Loads ◽  
Lagoon Of Venice ◽  
Point Source Pollution ◽  
Monitoring Programs

The results of three water quality monitoring programs implemented in the watershed of the Lagoon of Venice are presented. The programs focus on nutrient discharge because of its critical effect on eutrophication of the Lagoon. One of these programs is concerned with the long term variation of water quality. It shows the positive effect induced by the interventions on point source pollution of urbanised areas. It results in the reduction of ammonia concentration and in the increase of dissolved oxygen downstream of major cities. It also shows the negative effect of increases in corn crops in upland areas on the nitrate nitrogen concentration at the sources of major rivers. The short term monitoring program shows the quick variation of nutrient concentrations during rain events in the rivers, and the close relation between the diffuse pollution sources and the deterioration of water quality. The total nutrient loads measured at the monitored river outlets confirm the loads predicted by mathematical models for the whole basin, and the importance of the diffuse pollution loads on the global loads discharged into the Lagoon. The progress in reduction of point source pollution increases the role of the diffuse sources, and demands for urgent and strong intervention on those to reach the final goal of stable mesotrophic conditions in the water body. Finally, data analysis of the monitoring programs also indicates an effective strategy for further monitoring of the river basin focused on the effectiveness of the pollution abatement program, and the real time control of water quality for the management of the Lagoon of Venice.

scholarly journals Spatiotemporal Features of Pollutant Loads in the Yan River Basin, a Typical Loess hilly and Gully Watershed in the Chinese Loess Plateau

2021 ◽  
Author(s):  
Yanni Song ◽  
Yiping Wu ◽  
Changshun Sun ◽  
Fubo Zhao ◽  
Jingyi Hu ◽  
...  
Keyword(s):  
Water Quality ◽  
Point Source ◽  
River Basin ◽  
Loess Plateau ◽  
Assessment Tool ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
Pollutant Loads ◽  
Monthly Streamflow ◽  
The Chinese Loess Plateau

Abstract Water quality is the restrictive factor for both ecosystem health and social development in the Chinese Loess Plateau, a unique area with most severe soil erosion, fragile ecology, and water shortage. Understanding the characteristics of the pollutant loads is of vital importance for the sustainability of eco-environment in the Loess Plateau. This study investigated the spatiotemporal changes of chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) loads by combining the Soil and Water Assessment Tool (SWAT) and regression model Load Estimator (LOADEST) in a typical loess hilly and gully watershed—the Yan River Basin (YanRB). Results showed that the model simulations of monthly streamflow and pollutant loads were in good agreement with those derived from the in-situ observations. The temporal variation analysis suggested that the pollutant loads were generally rising in the study period (2001–2018) at four of the five stations and reached the maximum in 2014, and the multi-year (i.e., 2001–2018 with 2013 being excluded due to extreme rainfall) average loads of COD, TN, and TP at the Tanjiahe station, which is close to the outlet of the basin, were 15,021 kg/d, 3,835 kg/d, and 168 kg/d, respectively. The spatial distribution of the TN and TP loads along the river seemed to be quite unique because the TP level were obviously higher at the midstream (e.g., Zhujiagou and Ganguyi) than the downstream (e.g., Tanjiahe), and the TN level decreased when the river flowed from Zhujiagou to Ganguyi. Further, the seasonal analysis indicated that the nutrient loads were the highest in summer, followed by autumn, and the loads in these two wet seasons contributed the most of the annual pollution loads—about 76% and 84% for TN and TP, respectively, indicating the higher flow, the higher pollution load, a similar point based on the inter-annual analysis. In addition, the contribution analysis of point source and non-point source pollutions demonstrated that NPS led to most of the pollutant loads at the whole watershed—87%, 85%, and 84% of the COD, TN, and TP loads, respectively. Overall, this study provided spatiotemporal distributions of the key pollutant loads in the YanRB and can be valuable for water quality protection and pollution control in this area.

Role of non-point sources in the development of a water quality management plan for the Mgeni River catchment

1995 ◽  
Vol 32 (5-6) ◽  
pp. 175-182 ◽  
Author(s):  
G. C. Pegram ◽  
A. J. Bath
Keyword(s):  
Water Quality ◽  
Point Source ◽  
River Basin ◽  
Water Quality Management ◽  
Source Area ◽  
River Basin Management ◽  
Management Plan ◽  
Point Sources ◽  
Source Areas ◽  
Basin Scale

Integrated river basin management depends upon information about existing and potential water quality problems. In the Mgeni River basin, the major water quality problems are sediment, nutrient and bacterial with at least 85 percent of the total contamination derived from non-point sources. This paper shows that it is of paramount importance that the development of management objectives and approaches be based on the understanding, quantification and interpretation of the seasonal and spatial variation in export from non-point source areas. Management and analysis requires the grouping of all non-point source areas into diffuse, concentrated and incident sources, with the emphasis on the source area and pollutant delivery rather than the water quality response. Traditionally monitored data is not sufficient for detailed interpretation of non-point source pollution. Comments are made regarding the problems associated with obtaining representative loading data for non-point sources. The choice of appropriate analysis techniques, which assist in the interpretation of the available data, is based upon an assessment of the information requirements for management, the conditions and the water quality problems in the study catchment. GIS-based basin scale and individual source area maps of pollution potential and export are used to support the time-series of catchment export. These techniques will be incorporated into the management information system (MIS).

Sign in / Sign up

Export Citation Format

Share Document