Quality Issues Regarding the Watercourses from Middle Basin of Jiu River

Major climate changes have determined the increasing of disasters frequency, attracting the attention of international community to sometimes irreparable consequences, on the entire world. Institutions, governmental and non-governmental organizations worldwide have modified their approach regarding disasters, trying to identify methods to prevent and reduce their impact on the environment and humanity. This means identifying of new instruments for risk assessment, in order to lead to disaster prevention, by involving all stakeholders interested in disaster risk management activities (public authorities, non-governmental organizations, communities, business sector). It is noteworthy that the attitude of contemporary society to climate change has modified: thus, the allocation of material and human resources for preventing and mitigation the effects of disasters have been greatly increased.

Section: Discussionmentioning

confidence: 99%

Applying Risk Management to Mitigate the Consequences of Climate Change

Mocuta¹,

Cristea²,

Rahoveanu³

et al. 2018

“…The development of algae can physically change the structure of habitats, can lower oxygen concentration and may increase the pH of water, causing a negative impact on aquatic ecosystems [10][11][12]. Over time, high levels of nutrients have reduced the number of sensitive species of fishis, algae developed under high nutrient conditions, typically producing toxins that affect drinking water as well as aquatic biodiversity [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Statistical Distribution and Spatio-Temporal Variation of Nutrients in Lower Danube River Waters Between km 375 - km 175 in Relation to Hydrological Regime

Radu¹,

Ionescu²,

Deák³

et al. 2020

Nutrient pollution, a growing problem for most European river basins, is a priority challenge in the Danube River Basin, a river that interconnects freshwater with the marine environment. The nutrient content of the Lower Danube waters in a river area where hydro-technical works to improve navigation conditions were carried out, respectively between km 375 and km 175, was evaluated in conection with other water quality parameters and with the hydrological regime. This paper is based on the data obtained during the period 2011-2017 on water samples taken from 10 sampling sections, and the following parameters were investigated: pH, ammonia nitrogen - NH4-N, nitrites - NO2-N, nitrates - NO3-N, total nitrogen - TN, orthophosphates - PO4-P, total phosphorus - TP, Chlorophyll a - Chl �a�, all of which are correlated with water flow - Q. The results showed a significant correlation between the nutrients content, Chl �a�, and water flow, taking into account both the anthropic and climatic pressures on the aquatic ecosystem and the impact of the water body loads on the Black Sea coastal zone.

“…Several techniques of waste-water treatment have dissimilar efficiency particularities and likewise various immediate consequences on the aquatic system. Numerous wastewater treatment plants have major energy consumption, several systems occupy large areas [5,6]. The purpose of wastewater treatment is to generate the treated effluent but excluding the causing of damage or disturbance to the populations and avoiding water contamination.…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of the Physicochemical Characteristics of Urban Wastewater Treatment Plants from Romania

Balanica¹,

Munteniță²,

Zeca³

et al. 2020

The analysis of several criteria for influent and effluent of urban sewer water treatment plant in south and south east of Romania, has a crucial role in establishing the correlations between these factors, and furthermore to assess the efficiency of the treatment system. Increasing urbanization degree and its complexity has made studies of the pollution impact appraisal to be a necessity. The mean values of the parameters measured from the wastewater plant influent like temperature, pH, suspended solids, chemical oxygen demand and biological oxygen demand vary from 17.13 � 0.23�C, 7.68 � 0.04, 234.72 � 1.55 mg/L, 396.42 � 0.76 mg/L, and 190.29 � 15.23 mg/L, respectively. The values of the above-mentioned quality indicators after the water treatment are 17.11 � 0.14�C, 7.56 � 0.03, 22.6 � 1.02 mg/L, 62.95 � 0.16 mg/L and 20.49 � 9.06 mg/L. Correlation study intended to define the feasible dependence among the evaluated parameters indicated that there were positive and negative correlations between the influent and effluent. The study conclusions point out the certitude that exist major optimizations in wastewater property after treatment processing.