Risks Associated of the Waters from Hydric Systems Urban`s. The case of the rio Barigui, south of Brazil

Abstract

The quantification of a chemical species isolated in natural waters does not allow the characterization of it as an environmental stressor. Therefore, it is necessary to associate different lines of research that allows the evaluation of risk on the water system. In this perspective, this study carries out approaches based on distinct research lines, allowing physical and chemical quantification in situ, determination of nutrient concentrations, chlorophyll-α, total alkalinity and metallic species (Cu, Ni, Fe, Cr, Zn and Pb). In addition, the dissolved organic matter was evaluated by means of spectrophotometric techniques and testing of acute toxicity with the organism Artemia sp. and Daphnia magna in water samples from the Barigüi River, southern Brazil. The results point to the existence of degradation processes and the input of organic matter that are affecting the dynamics of the species, influencing their chemical availability and toxicity in the water system.

Spatial assessment of flash‐flood vulnerability in the Moldova river catchment (N Romania) using theFFPI

“…The results obtained solve a series of problems of methodological relevance, highlighted in numerous studies on the development of flood hazard maps (da Silva et al, 2017; Diaconu et al, 2017; Diaconu, Peptenatu, Tanislav, & Mailat, 2019; Draghici et al, 2017; Guse et al, 2019; Hofmann & Schuttrumpf, 2019; Pintilii et al, 2017; Zelenakova, Ganova, Purcz, & Satrapa, 2015). The use of FFPI in highlighting flood hazard areas contributes to the development of methodologies to analyse flood hazard mapping through a better understanding of the physical geographic context in which this process occurs.…”

Flood Hazard Mapping Using the Flood and Flash-Flood Potential Index in the Buzău River Catchment, Romania

“…The methods used can be applied at a national level or on different river catchments, considering the increase in intensity of the climatic events and anthropic activities which nevertheless have a direct impact on the generation of floods and flash-floods. The flood hazard assessment by correlating the parameters of various factors which hold a direct impact on the generation of floods and flash-floods, with forest changes, historical flood locations and areas affected by torrentiality, represents a vital tool in the management of river catchments and for local authorities in order to implement public policies to prevent these types of natural hazards and avoid any human or economic losses [86][87][88].…”

Trends in the Evolution of Regional Disparities of Oncological Prevalence and Mortality in Romania

“…Taking into account the obvious current situation of geographical disparities, it is necessary to introduce new approaches needed for understanding the determinants of cancer. The methodology approached provides a broader view of the cancer distribution in Romania, the basis for further in-depth research and a complement to the studies completed so far on the disruption of territorial systems affected by ecosystem interventions [23][24][25][26][27][28][29]. At the level of development region, regarding the total cases of malignant tumors over the 10 years analyzed, most of the records are in the South Muntenia region, about 490,000 patients, and the fewest cases are in the West development region, about 310,000.…”