Abstract
A water quality study was carried out at the Adolfo López Mateos (ALM) reservoir, one of the largest tropical reservoirs in Mexico, located within an intensive agricultural region. In this study, the seasonal and spatial variations of nine water quality parameters were evaluated at four different sites along the reservoir semiannually over a period of seven years (2012–2018), considering the spring (dry) and fall (rainy) seasons. An analysis of variance was performed to compare the mean values of the water quality parameters for the different sampling sites. Then, a multiparametric classification analysis was carried out to estimate the spatial density of the sampling points by using a probabilistic neural network (PNN) classifier. The observations (seasonal and spatial) of the water quality parameters at the ALM reservoir revealed no significant influence. The trophic status was evaluated using the Carlson Modified Trophic State Index, finding the trophic state of the reservoir at the mesotrophic level, with nitrogen being the limiting nutrient. The PNN revealed neural interactions between total suspended solids (TSS) and the other four parameters, indicating that the concentration ranges of five parameters are equally distributed and classified.
Highlights
The alteration of biogeochemical cycles in waters bodies by the constant contribution of nutrients causes an increase in the amount of sediments, especially in lentic systems
This study proposes the use of statistical techniques in order to facilitate the interpretation of the physical and chemical characteristics of a large tropical reservoir located in Culiacan, Mexico; the trophic state of this water body was assessed by analyzing the spatial and seasonal variations of nutrients
The results indicate slight variations in temperature, precipitation, and evaporation
Summary
The alteration of biogeochemical cycles in waters bodies by the constant contribution of nutrients causes an increase in the amount of sediments, especially in lentic systems. This phenomenon generates a tendency towards the disappearance or loss of ecological functions [1,2]. Nutrient presence in water bodies leads to an increase in phytoplankton and algae biomass production. The quality of a water body is affected by high concentrations of nutrients (e.g., phosphates and nitrogen) that cause changes in the natural balance of a water body [6]. The observed changes in water quality characteristics due Environments 2019, 6, 61; doi:10.3390/environments6060061 www.mdpi.com/journal/environments
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
