Journal of Food, Agriculture and Environment

Geotechnologies and multivariate statistics applied to water resources management in a predominantly agricultural watershed

Author(s):

Suzana C. Wrublack *, Erivelto Mercante, Victor Hugo Rohden Prudente, Jefferson Luiz Gonçalves Silva, Márcio A. Vilas Boas, Lucas Volochen Oldoni

Recieved Date: 2015-01-04, Accepted Date: 2015-03-24

Abstract:

This study aimed to describe the application of geotechnologies in studies focused on water resources management in a predominantly agricultural watershed. The study was conducted in the watershed of the Lontras River in the southwest region of the state of Paraná. The image of satellite LANDSAT-8, dated 12.02.13, orbit/point 223/78, was used to perform the supervised classification using the SAM classifier. Water quality parameters - pH, DO, EC, turbidity, temperature, TDS and ORP - were monitored with a multiparameter probe in four different seasons (spring, summer, autumn and winter) in 2012. Multivariate statistical techniques were used in order to facilitate the interpretation of the relationships of dependence between water quality variables and land and soil use categories. PCA allowed the identification of the most relevant variables to explain water quality variation. They were significantly influenced by the seasons of the year and monitoring points. RDA showed no significant correlation between water quality variables when correlated to soil and land use categories in the watershed of the Lontras River. However, it allowed the direct ordering of these variables in the four different seasons, thus facilitating the interpretation of the environmental gradients.

Keywords:

Visual classification, sustainable soil and land use, water availability, geographic information system – GIS, multivariate analysis, areas of influence, Thiessen polygon, satellite images, water resources, environmental characteristics

---

Journal: Journal of Food, Agriculture and Environment
Year: 2015
Volume: 13
Issue: 2
Category: Environment
Pages: 201-209

---

Full text for Subscribers

---

Information:

Note to users

The requested document is freely available only to subscribers/registered users with an online subscription to the Journal of Food, Agriculture & Environment. If you have set up a personal subscription to this title please enter your user name and password. All abstracts are available for free.

Article purchasing

If you like to purchase this specific document such as article, review or this journal issue, contact us. Specify the title of the article or review, issue, number, volume and date of the publication. Software and compilation, Science & Technology, all rights reserved. Your use of this website details or service is governed by terms of use. Authors are invited to check from time to time news or information.

---

Purchase this Article:   20 Purchase PDF Order Reprints for 15

---

Share this article :