scholarly journals Evaluation of water quality of an urban stream in southeastern Brazil using Chironomidae larvae (Insecta: Diptera)

2010 ◽  
Vol 39 (6) ◽  
pp. 873-878 ◽  
Author(s):  
Vívian Oliveira ◽  
Renato Martins ◽  
Roberto Alves
Keyword(s):  
Water Quality ◽  
Urban Stream ◽  
Southeastern Brazil ◽  
Chironomidae Larvae

scholarly journals Alterations in land uses based on amendments to the Brazilian Forest Law and their influences on water quality of a watershed

2015 ◽  
Vol 75 (1) ◽  
pp. 125-134 ◽  
Author(s):  
JL. Rodrigues-Filho ◽  
RM. Degani ◽  
FS. Soares ◽  
NA. Periotto ◽  
FP. Blanco ◽  
...  
Keyword(s):  
Water Quality ◽  
Aquatic Ecosystems ◽  
Forest Cover ◽  
Water Bodies ◽  
Partial Substitution ◽  
Southeastern Brazil ◽  
Agricultural Activities ◽  
Land Uses ◽  
Forest Law

The amendments to the Forest Law proposed by the Brazilian government that allow partial substitution of forested areas by agricultural activities raised deep concern about the integrity of aquatic ecosystems. To assess the impacts of this alteration in land uses on the watershed, diffuse loads of total nitrogen (Nt) and total phosphorus (Pt) were estimated in Lobo Stream watershed, southeastern Brazil, based on export coefficients of the Model of Correlation between Land Use and Water Quality (MQUAL). Three scenarios were generated: scenario 1 (present scenario), with 30-meter-wide permanent preservation areas along the shore of water bodies and 50-meter-radius in springs; scenario 2, conservative, with 100-meter-wide permanent preservation areas along water bodies; and scenario 3, with the substitution of 20% of natural forest by agricultural activities. Results indicate that a suppression of 20% of forest cover would cause an increase in nutrient loads as well as in the trophic state of aquatic ecosystems of the watershed. This could result in losses of ecosystem services and compromise the quality of water and its supply for the basin. This study underlines the importance of forest cover for the maintenance of water quality in Lobo Stream watershed.

scholarly journals Inadequate riparian zone use directly decreases water quality of a low-order urban stream in southern Brazil

2020 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Enzo Luigi Crisigiovanni ◽  
Elynton Alves do Nascimento ◽  
Rodrigo Felipe Bedim Godoy ◽  
Paulo Costa de Oliveira-Filho ◽  
Carlos Magno de Sousa Vidal ◽  
...  
Keyword(s):  
Water Quality ◽  
Urban Space ◽  
Surface Waters ◽  
Riparian Forest ◽  
Biological Indicators ◽  
Urban Stream ◽  
Physical Chemical ◽  
Association Design

 Considering the current importance watercourses quality conservation, it is important to establish relationships between parameters that enable evaluation of the origins of changes in water quality, allowing actions to mitigate them. However, it is important to improve the association of different variables and to take sufficient samples. This study associates usual techniques and parameters to analyse the water quality of an urban river from Paraná State, Brazil. For this, we used biological indicators (aquatic macroinvertebrates), physical-chemical (temperature, turbidity, true colour, pH, DO and BOD5,20) indicators and microbiological (faecal and total coliforms) indicators. These indicators were related to land use and occupation classes obtained from high resolution QuickBird 2 images. For this association, the surroundings (450 meters buffer) of three distinct points of the river were considered: I. Near the spring; II. In the downtown city; and III. In a residential neighbourhood. Different values of physical, chemical and microbiological variables were detected along the river, showing evident relationships between them and with the use and occupation of the urban and peri-urban space in the characterization of surface waters. The association design was able to detect the landscape effect on water quality in a coherent way and that these connections were mainly related to suppression of the riparian forest present in the surroundings, further demonstrating the importance of this vegetation for the maintenance of watercourse quality.

Effects of land use and land cover on water quality of low-order streams in Southeastern Brazil: Watershed versus riparian zone

CATENA ◽  
2018 ◽  
Vol 167 ◽  
pp. 130-138 ◽  
Author(s):  
Kaline de Mello ◽  
Roberta Averna Valente ◽  
Timothy O. Randhir ◽  
André Cordeiro Alves dos Santos ◽  
Carlos Alberto Vettorazzi
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Land Cover ◽  
Riparian Zone ◽  
Southeastern Brazil ◽  
Effects Of Land Use ◽  
Low Order

Spatial and Temporal variation analysis of water quality of Hemavathi River, Karnataka, India

2018 ◽  
Vol 6 (9) ◽  
pp. 196
Author(s):  
Santhosh K. M ◽  
S. Prashanth
Keyword(s):  
Water Quality ◽  
Agricultural Runoff ◽  
Spatial And Temporal Variation ◽  
Final Conclusion ◽  
Variation Analysis ◽  
Pollution Load ◽  
Quality Of Water ◽  
Pollution Loading ◽  
Origin Point

Urban development, agricultural runoff and industrialization have contributed pollution loading on the environment.  In this study Hemavathi river water from a stretch from its origin point to its sangama was studied for pollution load by determining parameters of water quality like pH, Alkalinity,  Ca, Mg, Nitrate, TDS, BOD, COD , and the results were compared with WHO and BIS standards to draw final conclusion on the quality of water.

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