scholarly journals Distribution of Water Quality in the Sasar River Basin According to the EPT (Ephemeroptera, Plecoptera, Trichoptera) Zoobenthos Bioindicators

2011 ◽  
Vol 68 (2) ◽  
Author(s):  
Oana MARE ROSCA ◽  
Lucia MIHALESCU ◽  
Aurel MAXIM ◽  
Zorica VOSGAN ◽  
Monica MARIAN
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Hydrographic Basin ◽  
The North ◽  
Total View ◽  
Baia Mare ◽  
Basin Water ◽  
The City ◽  
North Western

The hydrographic basin of the Sasar River is located in the north-western part of Romania, a highly industrialized region until 2000, its main point being the city of Baia Mare. Here the main pollutant economic fields were mining and metallurgy. Thus, pollution affected all life environments of this region, including the health of the population. This paper presents the assessment of the ecologic status of the Sasar River Basin water quality. Thus, the zoobenthic communities of the Sasar River and its main tributaries were monitored for 4 years, twice a year, during 2004-2008. The analysis of the quality zoobenthic indices offers a total view about the ecologic status of a watercourse. From the multitude of bioindicator groups, the taxons belonging to the EPT (EPHEMEROPTERA, PLECOPTERA, TRICHOPTERA) communities were chosen, due to their implied ecologic relevance. The maximum number of the taxons belonging to the EPT communities were recorded for the Valea Măriuţii station (28), followed by the Valea Limpedea station (24), and the minimum EPT taxons were recorded for the stations of Valea Firiza (1), upstream from Baia Mare (1) and downstream from Baia Mare (1).The distribution of the saprobity degree of the analyzed EPT bioindicators is as it follows: 32 oligo-saprobic individuals (26,44%), 18 oligo-beta-mezosaprobic individuals (14,87%), 39 beta-mezosaprobic individuals (32,23%) and 2 beta-alfa-mezosaprobic individuals (1,65%).

scholarly journals Monitoring the Macrozoobenthos of the Sasar River Basin, Based on Some Ecologic Indices

2010 ◽  
Vol 67 (2) ◽  
Author(s):  
Oana MARE ROŞCA ◽  
Lucia MIHALESCU
Keyword(s):  
River Basin ◽  
Catchment Basin ◽  
Hydrographic Basin ◽  
The North ◽  
Baia Mare ◽  
North Western

The hydrographic basin of the Sasar River is located in the North-Western part of Romania, and it totalizes 311 km2. A large part of the catchment basin is within the mining perimeter of Baia Mare; the Sasar River is its main drainage axis. Subsequent to the systematic studies of 2003-2006, 74 taxons were identified.

Applying Probabilistic Water Quality Standards in River Basin Water Quality Optimization Models

1974 ◽  
Vol 9 (1) ◽  
pp. 25-29
Author(s):  
M. B. Bayer
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Minimum Cost ◽  
Water Quality Standards ◽  
Quality Optimization ◽  
Basin Water ◽  
Do Concentration ◽  
Water Quality Models

Abstract This paper describes a method of applying probabilistic DO (dissolved oxygen) and BOD (biochemical oxygen demand) standards in river basin water quality models. Maximum likelihood estimators for the DO and BOD concentrations variances for each reach are used to obtain a lower bound for BOD so that the probability of violating specified DO and BOD standards is less than Θ per cent in any reach. These boundary values for DO and BOD concentrations are incorporated into a nonlinear water quality optimization model for finding the minimum cost set of wastewater treatment plant efficiencies required to meet DO and BOD standards. The method also provides the minimum DO concentration and the maximum BOD concentration which may be expected to occur 1-Θ of the time for any reach.

scholarly journals FORM DIVERSITY OF POPULUS NIGRA L., P. LAURIFOLIA LEDEB. AND P. × JRTYSCHENSIS CHANG Y. YANG IN THE NORTH-WESTERN PART OF THE ALTAI-SAYANIAN MOUNTAIN AREA

2017 ◽  
Vol 2017 (2) ◽  
pp. 19-24
Author(s):  
Андрей Климов ◽  
Andrey Klimov ◽  
Борис Прошкин ◽  
Boris Proshkin
Keyword(s):  
Adaptive Capacity ◽  
River Basin ◽  
Systematic Study ◽  
Sustainable Construction ◽  
Mountainous Area ◽  
Mountain Area ◽  
Breeding Potential ◽  
The North ◽  
Initial Basis ◽  
North Western

The study of the form diversity of Siberian poplar species P. nigra , P. laurifolia and P. × jrtyschensis serves as the initial basis for identifying the adaptive capacity of populations, their economically valuable forms and breeding potential. The carried out analysis of the polymorphism of the species in nature and their cultivated forms showed their considerable diversity in terms of their habitual characteristics. It was revealed that the species of P. nigra , P. laurifolia and P. × jrtyschensis have been studied rather irregularly. The paper features an assessment of the form diversity in the North-Western part of the Altai-Sayan mountainous area. The analysis was performed on the basis of qualitative features of the crown, bark, leaves and shoots. Within the studied territory, P. nigra is characterized by the presence of two morphotypes, according to the nature of the pubescence and two distinct forms of bark color. It has been established that the populations of P. laurifolia of the Tom’ river basin are characterized by a greater polymorphism, both according to the diversity of morphotypes of shoots and pubescence, and by the color and structure of the cortex. The white and green bark forms of the laurel poplar are valuable for sustainable construction and selection work. In P. × jrtyschensis , gray bark forms predominate in populations, and its diversity requires a further systematic study.

scholarly journals WATER QUALITY INDEX OF TIGRIS RIVER WITHIN BAGHDAD CITY: A REVIEW

2021 ◽  
Vol 25 (3) ◽  
pp. 34-43
Author(s):  
Tamarah A. Adnan ◽  
◽  
Eman A. Mohammed ◽  
Abdul-Sahib T. Al-Madhhachi ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Fecal Coliform ◽  
Suspended Solids ◽  
Review Paper ◽  
Total Suspended Solids ◽  
Total Hardness ◽  
Iron Ion ◽  
The North ◽  
Tigris River ◽  
The City

Tigris River is the only potable source in Baghdad city therefor many water treatment plants were built on the banks such as Al-Karkh, Sharq Dijla, Al-Sadr, Al-Wathba, Al-Karama, AlQadisia, Al-Dora, Al-Wahda, and Al-Rashed project. Tigris River suffers from the pollution that comes from various sources such as Industry, domestic sanitation, and farming activities therefore several indices were used to calculate water quality within Baghdad to convert physicochemical parameters of water to a single value that represents the river status (good, bad, very bad, etc..).The aim of this review paper to show the results of previous studies about the water quality for the Baghdad region. Most results showed that water quality was good in the north of the city of Baghdad and bad in the south of Baghdad. The deterioration of water quality was due to many reasons such as the discharge of wastewater directly into the river without pretreatment, increase in (Electic conductivity, Turbidity, and total suspended solids, total hardness, Iron ion, the fecal coliform)concentrations, and Climate change, therefore, Tigris River needs intensive treatment before using by humans.

Sidi Khrebish Excavations, Benghazi, 1972-73

1973 ◽  
Vol 4 ◽  
pp. 11-18 ◽  
Author(s):  
J. A. Lloyd
Keyword(s):  
Short Distance ◽  
Major Part ◽  
Annual Reports ◽  
Director General ◽  
Full Account ◽  
Long Period ◽  
The North ◽  
Active Interest ◽  
The City ◽  
North Western

A full account of the Society's involvement with the emergency excavations at Sidi Khrebish, Benghazi, is contained in the Annual Reports for 1970–1 and 1971–2. In November 1972, at the invitation of the Libyan Department of Antiquities, the Society sent out a fresh team of archaeologists to begin the new season's excavations. Work has since continued uninterrupted until the time of writing (1 July 1973) and is due to finish at the end of September.The preservation of the site from redevelopment for another year owes a great deal to the keen and active interest of the late Director-General of Antiquities, Mr Awad Sadawya, and the success of the expedition is greatly indebted to his efforts. We owe our thanks also to the officials of the Department of Antiquities whose sustained good will and co-operation has helped us greatly over this long period. In particular Mr Mohammed Nemri, Acting Director-General of Antiquities, Mr Abdulhamid Abdussaid, Controller of Antiquities for the Benghazi area, and Mr Ali Salem Letrik, Deputy Controller of Antiquities for Benghazi have taken full part in what has always been a team operation.The disused Turkish cemetery of Sidi Khrebish lies close to the sea, a short distance to the north of the bustling commercial heart of modern Benghazi (see Fig. 1). It covers part of the north-western outskirts of the city of Berenice, founded in 247 B.C., the Hellenistic and Roman successor to the Hellenic city of Euesperides. The major part of the city lies to the south and to the east of the cemetery, under the mixture of Turkish, Italian and more recent buildings which form the modern town.

Exploration of Environmental Education on Campus-Huanggang River Watershed Protection in Case

2011 ◽  
Vol 311-313 ◽  
pp. 992-995
Author(s):  
Qing Yu Wang ◽  
Shi Kun Li
Keyword(s):  
Water Pollution ◽  
Water Quality ◽  
Environmental Education ◽  
River Basin ◽  
East China ◽  
River Watershed ◽  
Watershed Protection ◽  
Resource Protection ◽  
Basin Water ◽  
Water Quality Trends

Abstract: To Huanggang River watershed protection, for example, to carry out the exploration of environmental education on campus. River basin water pollution on the East China survey, indicating that the industry, and agriculture are the three sources of life; of the East China River Basin water quality trends and the causes of water pollution in Huanggang River Basin; described Huanggang the importance of water resource protection, and Defining the student's role in the protection of the environment.

scholarly journals Spatial Assessment of Seasonal Changes in Pollution of the Air Ground Layer with Aerosol Particles in School Yards of Tiaret city (Algeria)

2019 ◽  
Vol 28 (1) ◽  
pp. 140-147
Author(s):  
Khadidja Naceur ◽  
Mhamed Maatoug ◽  
Lazreg Benaichata ◽  
S. А. Stankevich ◽  
O. V. Titarenko ◽  
...  
Keyword(s):  
Heavy Traffic ◽  
Dust Particles ◽  
Winter Period ◽  
Low Grade ◽  
Fuel Quality ◽  
Nature Protection ◽  
Protective Function ◽  
The North ◽  
The City ◽  
North Western

According to the data obtained in the autumn-winter period, the excess of PM2.5 in air during the schoolday after a short stay by pupils in the school yards was 1.5 –2 times. The PM2.5 concentration in the autumn - winter period was up to 1.5 times higher than that of the spring – summer time. High concentrations of dust particles are observed in areas close to heavy traffic in winter in the South-Eastern part of the city. Low concentrations were recorded in the autumn-winter time in areas adjacent to forests in the North –Western part of the city of Tiaret. However, the protective function of forest stands in the spring – summer period in the North-Western part of the city of Tiaret is less evident. The need for introduction of several nature protection measures in the city is obvious. Among them: fuel quality control and fines for the use of low-grade fuel, increasing the density of trees and shrubs in the city in the areas uncovered by vegetation.

Sign in / Sign up

Export Citation Format

Share Document