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Environmental Analysis & Ecology Studies

Evaluation of the Relationship between the Use and Occupation of the Soil and the Quality of Water from an Experimental Basin through the Water Quality Index (Iqa) and Tropical State Index (Eit)

  • Open or Close Vania Elisabete S1*, Renata Cornelli2, Naubert Zanoni3, Sofia Helena Zanella Carra4, Gisele Cemin5 and Geise Macedo dos Santos6

    11PhD in Water Resources Engineering and Environmental Sanitation, Hydraulic Research Institute, Brazil

    2Master and PhD in Production Engineering, Brazil

    3MSc in Engineering and Environmental Sciences, Brazil

    4Master in Engineering and Environmental Sciences, Brazil

    5Graduated in Biological Sciences from UNIVATES, PhD in Remote Sensing at UFRGS, Brazil

    6Civil Engineering Student, Scientific Initiation Scholarship (BIC/UCS), Brazil

    *Corresponding author: Vania Elisabete Schneider, PhD in Water Resources Engineering and Environmental Sanitation, Hydraulic Research Institute, Brazil

Submission: June 06, 2018; Published: December 04, 2018

DOI: 10.31031/EAES.2018.04.000594

ISSN: 2578-0336
Volume4 Issue4


This study aimed to verify the influence of land use and occupation on the quality of water resources in an experimental watershed, in order to assess the impact of pig activity through the Water Quality Index (WQI) and Trophic State Index (TSI). To do so, they were prepared using maps and land occupation with the aid of satellite images in which were defined using 6 classes (native forest, agriculture, forestry, exposed soil, water depth and clouds/shadows) and, in parallel, there were 14 monitoring campaigns of water quality in the period August 2012 to February 2015 at 7 sampling points. With the analysis of the results it was observed that in 88% of the samples ranged from WQI fair and poor, very close to the lower limit, by virtue of the presence of coliform, turbidity, total phosphorus, total nitrogen and total solids. For the TSI, there was a significant presence of phosphorus and chlorophyll-a leading in 91% of the samples, the trophic level between hypertrophic and super trophic.

The values that WQI and TSI may be associated with installed pig activity in the region, due to the significant generation of waste and the resulting environmental impacts added to the mismanagement of this, beyond sanitary wastewater generated by the municipalities that make up the experimental basin, whose release into waterways without an effective treatment corroborates reducing quality.

Keywords:WQI; TSI; Use and land use; Water quality; Water resources

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