scholarly journals Fitoplâncton como Bioindicador de Eventos Extremos na Bacia do Rio Una, Pernambuco, Brasil (Phytoplankton as Bioindicator of Extreme Events in River Basin Una, Pernambuco, Brazil)

2013 ◽  
Vol 6 (4) ◽  
pp. 697 ◽  
Author(s):  
Ariane Silva Cardoso ◽  
Silvio Mario Pereira da Silva Filho ◽  
Anthony Epifanio Alves ◽  
Cacilda Michele Cardoso Rocha ◽  
Maristela Casé Costa Cunha
Keyword(s):  
Water Quality ◽  
Population Dynamics ◽  
Control System ◽  
Environmental Factors ◽  
River Basin ◽  
Flood Control ◽  
Frequency Of Occurrence ◽  
Check Dams ◽  
Transitional Environment ◽  
The Government

A Bacia do Rio Uma é uma das Bacias Hidrográficas mais importantes do Estado de Pernambuco, e vem enfrentando desastres causados por cheias. Em resposta as últimas enchentes ocorridas no Estado, o Governo de Pernambuco desenvolveu um Sistema de Controle de Cheias, com uma programação para o Rio Una, de construção de quatro barragens de contenção, represamento e regularização de abastecimento de água nas cidades circundantes. A qualidade da água após a transição de um ambiente lótico para lêntico poderá ser alterada e dependerá de diversos fatores ambientais. O fitoplâncton responde com boa fidelidade a essas mudanças. Nas bacias estudadas, foram identificados 45 táxons infragenéricos de organismos fitoplanctônicos pertencentes ao grupo das Ochorophyta (40%), Chlorophyta (20%), Charophyta (20%), Cyanophyta (13%) e Euglenophyta (7%). Sendo a divisão Ochrophyta mais representativa com relação à riqueza e frequência de ocorrência. Não ocorrem valores expressivos de densidade nas amostragens. Assim, estudar a composição e a dinâmica populacional da comunidade fitoplanctônica é de fundamental importância para o entendimento da sustentação e conservação desse ecossistema, sobretudo por se tratar de um ambiente em transição e pela carência de estudos na região. ABSTRACT A River Basin is one of the most important Watershed State of Pernambuco, and this has been facing disasters caused by floods. In response to the recent floods occurred in the State, the Government of Pernambuco developed a Flood Control System, with a schedule for the Rio Una, four-building check dams, impoundment and regulation of water supply in the surrounding towns. The water quality after the transition from a lotic to lentic may change and depend on various environmental factors. Phytoplankton responds with good fidelity to these changes. Basins studied, 46 were identified taxa of phytoplankton organisms belonging to the group Ochorophyta (40%), Chlorophyta (20%), Charophyta (20%), Cyanophyta (13%) and Euglenophyta (7%). As the division Ochrophyta more representative with respect to wealth and frequency of occurrence. No significant values occur in sampling density. Thus, studying the composition and population dynamics of phytoplankton is of fundamental importance for the understanding and support of the conservation of this ecosystem, mainly because it is a transitional environment and the lack of studies in the region. Keywords: Phytoplankton, Una River basin, impounding water.

Water quality management in the Kaoping River watershed, Taiwan

2003 ◽  
Vol 47 (7-8) ◽  
pp. 209-216 ◽  
Author(s):  
C.-M. Kao ◽  
K.-F. Chen ◽  
Y.-L. Liao ◽  
C.-W. Chen
Keyword(s):  
Water Quality ◽  
Point Source ◽  
River Basin ◽  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Water Quality Management ◽  
Oxygen Demand ◽  
Quality Analysis ◽  
Livestock Wastewater ◽  
The Government

The Kaoping River basin is the largest and the most intensively used river basin in Taiwan. It is 171 km long and drains a catchment of more than 3,250 km2. Based on the current water quality analysis, the Kaoping River is heavily polluted. Concern about the deteriorating condition of the river led the Government of Taiwan to amend the relevant legislation and strengthen the enforcement of the discharge regulations to effectively manage the river and control the pollution. Investigation results demonstrate that both point and non-point source pollutants are now the causes of biochemical oxygen demand (BOD), nutrients, and pathogens in the river. The main water pollution sources are livestock wastewater from hog farms, municipal wastewater, industrial wastewater, non-point source (NPS) pollutants from agricultural areas, and leachate from riverbank landfills. The current daily BOD, NH3-N, and TP loadings to Kaoping River are 74,700, 39,400, and 5,100 kg, respectively. However, the calculated BOD, NH3-N, and TP carrying capacities are 27,700, 4,200, and 600 kg per day. To protect public health and improve the river water quality, a comprehensive management and construction strategy is proposed. The proposed strategy includes the following measures to meet the calculated river carrying capacity: (1) a hog ban in the entire Kaoping River basin, (2) sewer system construction to achieve 30% of connection in the basin within 10 years, (3) removal of 10 riverbank landfills, and (4) enforcement of the industrial wastewater discharge standards. After the implementation of the proposed measures, the water quality should be significantly improved and the BOD and nutrient loadings can be reduced to below the calculated carrying capacities.

1D and 2D Coupled Numerical Model for Flood Control in Middle Reach of Huaihe River

2013 ◽  
Vol 275-277 ◽  
pp. 2659-2668
Author(s):  
Zhen Kun Ma ◽  
Zi Wu Fan ◽  
Ming Zhang ◽  
Yi Lu Su ◽  
Zhi Ling Sun
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
River Basin ◽  
Flood Control ◽  
Flood Forecast ◽  
Huaihe River Basin ◽  
Middle Reach ◽  
Huaihe River ◽  
Flood Regulation ◽  
The Huaihe River

The core technique of flood forecast and pre-warning of a river basin is the numerical simulation of flood process in a complicated flood control system. According to the structural features, flood features, and flood process mechanism of a large and complicated flood control system, a 1D and 2D coupled numerical simulation model was established. The 1D model was used for the trunk river and main branches, and the 2D model was used for flood districts. The coupled 1D and 2D was used to simulate the flood regulation and process in rivers, lakes, flood districts, and floodways. A case study was conducted in the section from the Wangjiaba to Bengbu floodgates in the middle reach of the Huaihe River. The coupled model was employed to synchronously simulate the branch rivers and trunk flood of the river basin and to improve the accuracy of flood simulation, flood forecast, and regulation of the river basin. The parameters of the model for simulating the flood process of the Huaihe River Basin in 2003 were calculated and verified, and the flood process in 2007 was demonstrated. The simulated results show that the flood regulation and process can be accurately simulated by the proposed numerical model, and the accuracy requirements can be satisfied. Finally, the model was applied to the effect analysis of a four-grade emergency flood control plan in the Huaihe River Basin.

scholarly journals KARAKTERISTIK KUALITAS AIR DANAU LIMBOTO, PROVINSI GORONTALO

2017 ◽  
Vol 15 (1) ◽  
pp. 59
Author(s):  
Krismono, Krismono, ◽  
Lismining Pujiyani Astuti ◽  
Yayuk Sugianti
Keyword(s):  
Carbon Dioxide ◽  
Water Quality ◽  
Environmental Factors ◽  
Fisheries Management ◽  
Flood Control ◽  
Quality Characteristic ◽  
Total Alkalinity ◽  
Water Quality Characteristic ◽  
Free Carbon Dioxide ◽  
Control Water

Danau Limboto terletak pada ketinggian 25 m di atas permukaan laut yang berada di Kabupaten Gorontalo, Provinsi Gorontalo. Danau ini berfungsi untuk perikanan tangkap, perikanan budi daya, dan pengendalian banjir. Kualitas air merupakan kunci penting bagi kehidupan ikan dan salah satu masukkan penting untuk pengelolaan kegiatan perikanan. Penelitian ini bertujuan untuk mengetahui keadaan kualitas air Danau Limboto. Penelitian ini dilaksanakan pada bulan Maret, Mei, September, dan Nopember 2006. Pengambilan contoh air dilakukan di lima stasiun pengamatan dengan metode survei berstrata. Hasil penelitian menunjukkan bahwa suhu, pH, alkalinitas total, oksigen terlarut, dan karbondioksida bebas Danau Limboto mendukung untuk kegiatan perikanan. Berdasarkan pada tingkat kecerahan, N-NO3, P-PO4, klorofil-a, dan kelimpahan plankton, danau ini termasuk ke dalam perairan eutrofik hingga hipertrofik (subur). Limboto Lake is located in Gorontalo District, Gorontalo Province at 25 m above sea level. The lake functions as capture and culture fisheries and flood control. Water quality is an important environmental factors for fisheries management. The objective of this research was to identify the water quality characteristic of Limboto Lake. Research was done at March, May, September, and November 2006. Water samples was taken in each research stations using survey stratified method. The results showed that temperature, pH, total alkalinity, dissolved oxygen, and free carbon dioxide were in the level of supporting the fisheries activity. Based on transparency, N-NO3, P-PO4, chlorophylla, and abundance of plankton, the lake was catagorized as eutrophic to hypertrophic waters.

scholarly journals AN ALTERNATIVE FOR FLOOD CONTROL IN THE ICARAÍ RIVER BASIN, NITERÓI CITY, RIO DE JANEIRO, BRAZIL

Engevista ◽  
2013 ◽  
Vol 16 (4) ◽  
pp. 292
Author(s):  
Ivan Aurélio Fortuna Kalil de Faria ◽  
Gustavo Carneiro de Noronha ◽  
Mônica De Aquino G. Massera da Hora
Keyword(s):  
Control System ◽  
River Basin ◽  
Rio De Janeiro ◽  
Flood Control ◽  
Peak Discharge ◽  
Flood Routing ◽  
Storm Water ◽  
Reservoir Capacity ◽  
Design Storm ◽  
Janeiro State

This paper demonstrates that it is possible to implement a flood control system (called “piscinão”) in Niterói city, located in Rio de Janeiro State, Brazil composed by a reservoir that retains temporally the storm water. The recommended design storm equation and flood routing were applied in order to design the reservoir capacity. The results indicate that it is feasible to implement such solution, reducing more than two thirds of the peak discharge downstream, thus mitigating the damages caused by flood in Niterói city.

Characteristics of Water Quality in Tributaries of the Sumjin River Basin

2017 ◽  
Vol 18 (6) ◽  
pp. 563-570
Author(s):  
Se Chang Son ◽  
Dae Hoon Kim ◽  
Jae Chun Lee ◽  
Jae Young Jae Young ◽  
Ki Wan Lee ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin

Water Quality Characteristics for Agricultural Reservoirs in Yeongsan River Basin

2020 ◽  
Vol 21 (1) ◽  
pp. 15-23
Author(s):  
Sang-Guen Oh ◽  
Jae-Young Lee ◽  
Jae-Woon Jung ◽  
Ju-Tae Song ◽  
Sang-Yun You ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Quality Characteristics

Buying Behavior of Organizations for Software Products: Influence of Environmental Factors

2019 ◽  
Vol 118 (10) ◽  
pp. 252-271
Author(s):  
Md. Hashmathur Rehman ◽  
Dr. M. Rajkumar
Keyword(s):  
Environmental Factors ◽  
Board Members ◽  
Governing Board ◽  
Buying Behavior ◽  
Multiple Stakeholders ◽  
Software Products ◽  
Environmental Situation ◽  
Business Operations ◽  
Innovation Dynamics ◽  
The Government

The environmental situation for an organization is the environment in which an organization operates.It consists of multiple stakeholders such as governing board members, business competitors, suppliers,customers, the government, etc. They can influence the organization’s decision to adopt an innovation. The influence can ease the organization in adopting the innovation or it can block or affect negatively the organization’s decision to adopt the innovation. Dynamics of the market in which the organization operatesand business competitors will also influence the organization’s decision to adopt innovations.  Customers, Suppliers are sources who will exercise their powers and influence the organization’s decision. Governmentregulation is also equally important and will influence the organization’s decision to adopt innovation. In a nutshell, the environment will influence the organization’s decision to adopt innovations for its business operations.

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