Development of a basin management program to improve water quality in rivers based on an environmental water quality predictive model

2019 ◽  
Vol 19 (7) ◽  
pp. 2009-2020
Author(s):  
G. Calvo-Brenes ◽  
J. Mora-Molina
Keyword(s):  
Water Quality ◽  
Negative Impact ◽  
Secondary Forest ◽  
Environmental Water ◽  
Management Program ◽  
Agricultural Activity ◽  
Conservation Area ◽  
Osa Peninsula ◽  
Crop Cultivation

Abstract This research has the aim of establishing the amount of land that the Conservation Area National System (SINAC) needs to buy and specifying its use inside the Golfo Dulce Forest Reserve in order to maintain the good quality of the rivers. The study was done inside Rincon sub-basin in the Osa Peninsula, a land dedicated to primary and secondary forest (Melina tree plantations), mangrove forest, urbanism, chaparral, pasture for grazing livestock and crop cultivation, mainly rice and African palm; uses that may change in time affecting the actual water quality (WQ) in rivers and the bay. Changes in land uses modify the WQ and it can be predicted using WQ models based on environmental variables through the evaluation of different scenarios. It was found through modeling that pasture or chaparral land use has no negative impact on WQ; all the contrary happens with increments in crop cultivation or human population. At the present, the coastal area, adjacent to the reserve, has low agricultural activity but that could increase over time, affecting the WQ. Therefore, SINAC should continue with its acquisition land activity to counteract the negative environmental effect of agricultural activity to preserve the actual good quality of the rivers.

Distribusi Spasial dan Temporal Nutrien di Danau Tempe, Sulawesi Selatan

2016 ◽  
Vol 1 (2) ◽  
pp. 31
Author(s):  
Siti Aisyah ◽  
Sulung Nomosatryo
Keyword(s):  
Water Quality ◽  
Negative Impact ◽  
Temporal Distribution ◽  
Limiting Factor ◽  
Conservation Area ◽  
South Sulawesi ◽  
Nitrate N ◽  
High Sedimentation

<strong>Spatial and Temporal Distribution of Nutrient in Lake Tempe, South Sulawesi.</strong> The concentration of nutrients in the process of eutrophication have an important role in the freshwater productivity. Lake Tempe constitutes a conservation area for water resources that has been degraded, indicated by high sedimentation and abundant water weeds. This resulted in the lowered carrying capacity of the lake. This study aimed to determine the concentration and spatiotemporal distribution of nutrients in Lake Tempe as the basis for the management of the lake. Water samples were taken using Kemmerer water sampler in April, July, and October 2013 from seven stations. Dissolved oxygen, pH, temperature, and transparency were measured in situ, while the N-Nitrite, N-Nitrate, N-Ammonium, TN, orthophosphate, and TP as well as supporting parameters such as COD, TOM, and chlorophyll-a were analyzed in the laboratory using methods according to the Standard Method. The study showed the concentrations of N and P were varied at all observation sites. The concentrations of N-Nitrate, TN, and TP tended to be high in October, while the concentrations of N-Nitrite, N-Ammonium, and orthophosphate tended to be high in April. PCA analysis showed the water quality conditions in Lake Tempe were characterized by the N and P compounds. The high average concentrations of TN and TP in Lake Tempe with respective values of 1.386 mg/L and 0.198 mg/L indicated that the lake was a productive lake, classified as eutrophic with nitrogen as limiting factor of lake fertility. If the nutrient enrichment continues, it will have a negative impact on the water quality of the lake<br /><br />

Formulating biossay data of chemicals and environmental water

2000 ◽  
Vol 42 (3-4) ◽  
pp. 115-123 ◽  
Author(s):  
R. Shoji ◽  
A. Sakoda ◽  
Y. Sakai ◽  
M. Suzuki
Keyword(s):  
Water Quality ◽  
Low Density Lipoprotein ◽  
Water Environment ◽  
Density Lipoprotein ◽  
Environmental Water ◽  
Toxicity Data ◽  
Human Beings ◽  
Environmental Waters ◽  
Bodies Of Water

The quality of environmental waters such as rivers is often deteriorated by various kinds of trace and unidentified chemicals despite the recent development of sewage systems and wastewater treatment technologies. In addition to contamination by particular toxicants, complex toxicity due to multi-component chemicals could be much more serious. The environmental situation in bodies of water in Japan led us to apply bioassays for monitoring the water quality of environmental waters in order to express the direct and potential toxicity to human beings and ecosystems rather than determinating concentrations of particular chemicals. However, problems arose from the fact that bioassays for pharmaceutical purposes generally required complicated, time-consuming, expert procedures. Also, a methodology for feedback of the resultant toxicity data to water environment management has not been established yet. To this end, we developed a novel bioassay based on the low-density lipoprotein (LDL) uptake activity of human hepatoblastoma cells. The assay enabled us to directly detect the toxicity of environmental waters within 4 hours of exposure. This is a significantly quick and easy procedure as compared to that of conventional bioassays. The toxicity data for 255 selected chemicals and environmental waters obtained by this method were organized by a mathematical equation in order to make those data much more effectively and practically useful to the management of environmental waters. Our methodology represents a promising example of applying bioassays to monitor environmental water quality and generating potential solutions to the toxicity problems encountered.

scholarly journals Nutrient water quality of the Wye catchment, UK: exploring patterns and fluxes using the Environment Agency data archives

2003 ◽  
Vol 7 (5) ◽  
pp. 722-743 ◽  
Author(s):  
H. P. Jarvie ◽  
C. Neal ◽  
P. J. A. Withers ◽  
A. Robinson ◽  
N. Salter
Keyword(s):  
Water Quality ◽  
Sewage Treatment ◽  
Quality Data ◽  
Agricultural Activity ◽  
Spatial And Temporal Variability ◽  
Water Quality Data ◽  
Climatic Fluctuations ◽  
Mass Load ◽  
Environment Agency

Abstract. Water quality data, collected by the Environment Agency in England and Wales over 10 years (1991 – 2000) were used to examine the spatial distribution of nutrient pollution risk and for assessing broad-scale spatial and temporal variability in nutrient fluxes across the Wye catchment. Nutrient water quality across the upper and middle Wye catchment, and along the main River Wye, is generally very good. However, the main areas of concern lie in the small tributaries in the south and east of the catchment, which have lower dilution capacity and high agricultural and effluent inputs, and where mean Total Reactive Phosphorus (TRP) in some cases exceed 1 mg-P l-1. Indeed, mass load calculations have demonstrated that the lowland south and east portion of the catchment contributes more than 85% of the whole-catchment TRP and more than 78% of nitrate (NO3‾) loads. Ratios of NO3‾:Ca were used to fingerprint different water-types across the catchment, linked to weathering and agricultural activity. The Wye catchment has been subject to two major sets of perturbations during the study period: (i) climatic fluctuations, with a drought during 1995-6, followed by a subsequent drought-break in 1997/8, and extreme high river flows in the autumn/winter of 2000/2001, and (ii) introduction of tertiary P-treatment at major sewage treatment works in the catchment. The implications of these perturbations for the nutrient water quality of the Wye catchment are discussed. Recommendations are made for more targeted monitoring to directly assess diffuse source nutrient contributions. Keywords: nutrients, phosphate, phosphorus, nitrate, nitrogen, river, Wye, PSYCHIC, Defra

scholarly journals Influence of the quality of drinking water supply sources on the formation of the ecologically-dependent pathology of the population of the Republic of Dagestan

2021 ◽  
Vol 15 (4) ◽  
pp. 168-176
Author(s):  
M. G. Daudova ◽  
R. B. Bagomedova ◽  
K. K. Bekshokov ◽  
M. M. Medzhidova ◽  
S. M. Nakhibashev ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Negative Impact ◽  
Kidney Diseases ◽  
Ecological Condition ◽  
Drinking Water Quality ◽  
Chemical Contamination ◽  
The Republic

Aim. Study of the influence of drinking water quality on the ecologically-dependent morbidity of the population of the Republic of Dagestan.Material and Methods. Methods of current and retrospective analysis of regional health indicators and methods of mathematical-statistical and medical-geographical analysis were used. Statistical processing of the results was carried out using the STATISTICA and Excel software packages. When carrying out laboratory studies on the quality of drinking water, we used a Lumex atomic absorption spectrometer "MGA-915MD".Results. Numerous hygiene studies indicate the direct impact of unsatisfactory drinking water quality on the health of a population. The relationship between sanitary and chemical indicators and the incidence rate for a number of nosological forms has been proven. It is generally accepted that human health is influenced by lifestyle factors (working, living and relaxation conditions), heredity and the ecological condition of the area of residence, including the quality of drinking water. Although it is not possible to differentiate the share of the negative effect caused by the consumption of poor quality drinking water but the incidence of certain nosological forms (cancer of the esophagus, gastrointestinal tract and kidney diseases) in the those regions of the Republic of Dagestan under consideration correlates with the characteristics of drinking water.Conclusion. The problem of pollution of water supply sources for the population in the dynamics of the long-term remains a priority concern. The quality and safety of drinking water are decreasing, which cannot but have a negative impact on public health. Correlation linkages between indicators of drinking water quality and oncological morbidity of the population were also established in indicators below the maximum permissible concentrations, which corresponds to a typical logistic model of causal relationships and serves as evidence of the high dependence of health disorders on chemical contamination of water supply sources. 

scholarly journals Resolving conflicting objectives in the management of the Plastiras Lake: can we quantify beauty?

2005 ◽  
Vol 9 (5) ◽  
pp. 507-515 ◽  
Author(s):  
A. Christofides ◽  
A. Efstratiadis ◽  
D. Koutsoyiannis ◽  
G.-F. Sargentis ◽  
K. Hadjibiros
Keyword(s):  
Water Quality ◽  
Power Production ◽  
Environmental Water ◽  
High Quality ◽  
Water Release ◽  
Natural Landscape ◽  
Conflicting Objectives ◽  
Surrounding Landscape ◽  
Water Uses

Abstract. The possible water management of the Plastiras Lake, an artificial reservoir in central Greece, is examined. The lake and surrounding landscape are aesthetically degraded when the water level drops, and the requirement of maintaining a high quality of the scenery constitutes one of the several conflicting water uses, the other ones being irrigation, water supply, and power production. This environmental water use, and, to a lesser extent, the requirement for adequate water quality, results in constraining the annual release. Thus, the allowed fluctuation of reservoir stage is not defined by the physical and technical characteristics of the reservoir, but by a multi-criteria decision, the three criteria being maximising water release, ensuring adequate water quality, and maintaining a high quality of the natural landscape. Each of these criteria is analyzed separately. The results are then put together in a multicriterion tableau, which helps understand the implications of the possible alternative decisions. Several conflict resolution methods are overviewed, namely willingness to pay, hedonic prices, and multi-criteria decision analysis. All these methods attempt to quantify non-quantifiable qualities, and it is concluded that they don't necessarily offer any advantage over merely making a choice based on understanding.

scholarly journals Standards Role in Support of State Regulation of Water/economic Activities

2015 ◽  
pp. 7
Author(s):  
Keyword(s):  
Water Quality ◽  
Water Body ◽  
Negative Impact ◽  
Environmental Safety ◽  
State Regulation ◽  
Water Bodies ◽  
Economic Activities ◽  
Best Available Techniques ◽  
Detection And Identification

Upgrading of the national standardization system creates favorable conditions for support and normal promotion of integrated environmental standards as a toolbox for control of the process of minimization of adverse impacts with their concurrent accounting and possible redistribution among the environment elements, i.e. air, water bodies, and soils. In the Russian practice of environmental protection there is no any objective toolbox for comprehensive assessment of the current activities’ negative impact. In outlook adoption of the negative impact minimization mechanism is most probable through the many-year benchmarking with European expertise based on the revealing of cause-eff ect relations in terms of «relative improvement of technique against the attained quality of environment (objectives)». Water bodies are subjected both to direct and indirect negative impact. There is no one method for assessment of water bodies’ environmental safety as a basis for adoption of adequate solutions in water sector. The developed standards on the basis of water/economic activities without considerable emissions to air and to soils propose a toolbox to secure uniform quantitative assessment both the techniques negative impact through assessment of their waste water quality and assessment of water quality of the receiving water body. The developed toolbox provides detection of the «negative impact – water body water quality» causeeffect relations. Integrated criteria proposed in the standards provide ranking and classifying of negative impact objects, detection and identification of the national water/economic best available techniques, implementation of the combined approach in the process of adoption of integrated environmental permissions.

scholarly journals Research of the possibility of using Ceriodaphnia affinis Lilljeborg (Crustacea) in a short-term test while setting eological quality standards in Ukraine

2019 ◽  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Quality Standards ◽  
Environmental Water ◽  
Chemical Substance ◽  
Water Quality Standards ◽  
Short Term ◽  
Test Organisms ◽  
Ceriodaphnia Affinis

Formulation of the problem. Regulation of hazardous chemicals admission to surface water is carried out by means of appropriate water quality standards. Researching the systems of surface water quality regulation in different countries, it has been determined that there is a tendency to use standards for the protection of the aquatic ecosystem and for meeting the needs of society and industries - environmental quality standards. Such standards are based on obtaining ecotoxicological information of a dangerous chemical substance on the representatives of the aquatic ecosystem. Among them, some of the most sensitive test organisms are crustaceans from the Daphniidae family. They are used to establish water quality standards for chemicals, to assess the quality of wastewater and surface water using a toxicological indicator. It is recommended to use a standardized international methodology to assess effects of chemicals on Daphnia magna Straus (OECD No. 202) to establish environmental water quality standards in EU countries. However, in Ukraine, in water protection practice, the most popular test organism is Ceriodaphnia affinis Lilljeborg (Daphnia sp.). The purpose of the article. In order to set ecological standards for water quality of chemicals in Ukraine, the authors proposed to test the OECD No. 202 methodology using Ceriodaphnia affinis test organisms and to establish metrological characteristics for it. Presentation of the main research material. The authors tested the OECD methodology No. 202 [21] on the crustacean culture Ceriodaphnia affinis from the culture collection of the Laboratory of Ecological and Toxicological Research, the V. N. Karazin KhNU. The coefficient of variation of EC50-24 and EC50-48 K2Cr2O7 was 16,8 % and 15,9 % respectively. Based on the data obtained, the metrological characteristics of the tested method were established: the response range of the test organisms Ceriodaphnia affinis is the following – 1,45<EC50-24 <2,91 (mg/dm3); reproducibility of the results of determining the toxicity of a chemical substance – 0,18 mg/dm3 (16,1%); the error in the results of determining the toxicity of a chemical substance – 0,34 mg/dm3 (31.6 %); standard of operational control – 0,49 mg/dm3. Scientific novelty and practical significance. The findings confirm the possibility of using Ceriodaphnia affinis in a short-term test in setting environmental water quality standards in Ukraine.

scholarly journals Assessment of Spatial Variation in River Water Quality of the Baiyangdian Basin (China) during Environmental Water Release Period of Upstream Reservoirs

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 688
Author(s):  
Ling Zhou ◽  
Wenchao Sun ◽  
Quan Han ◽  
Haiyang Chen ◽  
He Chen ◽  
...  
Keyword(s):  
Water Quality ◽  
Spatial Variation ◽  
Total Nitrogen ◽  
Environmental Water ◽  
Urban Region ◽  
Lake Ecosystem ◽  
Water Release ◽  
Baiyangdian Lake ◽  
Pollutant Concentrations

Baiyangdian Lake, the largest freshwater body in Northern China, is facing water shortage and eutrophication problems that threaten the lake’s ecosystem. Environmental water releases from upstream reservoirs to the lake are important measures to provide the freshwater resources demanded by the lake ecosystem. However, knowledge is limited regarding the influences of such water allocations on the water quality of the upstream rivers that receive the reservoir water and transport it into Baiyangdian Lake. To improve our understanding of possible influences of environmental water releases from upstream reservoirs, the spatial variation of water quality in rivers upstream of the lake during environmental water release periods from reservoirs was explored in this study. Water samples were collected along the two routes of water allocation: the WangKuai reservoir route (WKR) and the XiDaYang reservoir route (XDYR) and water quality parameters related to organic pollutants, nitrogen and phosphorus were analyzed. In the WKR, the pollutant concentrations generally increased from upstream to downstream. Chemical oxygen demand, total nitrogen, and total phosphorous at the sampling site closest to Baiyangdian Lake could not meet the water quality target of the water function zone. For the XDYR, pollutant concentrations peaked downstream of the major urban region of Baoding city and then decreased or remained at a similar level further downstream and only the total nitrogen concentration was worse than the target. The dissimilarities in spatial variation patterns of water quality may be caused by the different spatial distribution of wastewater treatment plants in the two routes.

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