The Use of Hydrological Characteristics for Wetland Habitats Protection in Water Management of the Upper Narew River System

2007 ◽  
pp. 283-293
Author(s):  
Dorota Miroslaw-Swiatek ◽  
Tomasz Okruszko ◽  
Janusz Kubrak ◽  
Ignacy Kardel
Keyword(s):  
Water Management ◽  
River System ◽  
Hydrological Characteristics ◽  
Wetland Habitats

scholarly journals Zooplankton community of Parnaíba River, Northeastern Brazil

2015 ◽  
Vol 27 (1) ◽  
pp. 118-129 ◽  
Author(s):  
Ludmilla Cavalcanti Antunes Lucena ◽  
Thaís Xavier de Melo ◽  
Elvio Sergio Figueredo Medeiros
Keyword(s):  
Water Management ◽  
Biodiversity Conservation ◽  
Zooplankton Community ◽  
River System ◽  
Dry Season ◽  
Large Rivers ◽  
Northeastern Brazil ◽  
Wet Season ◽  
Marginal Areas ◽  
River Diversions

Aim:The objective of the present work is to present a list of species of zooplankton (Rotifera, Cladocera and Copepoda) from the Parnaíba River. Additionally, we provide comments on their distribution along the river, and between dry and wet seasons.MethodsZooplankton was collected with a plankton net (60 µm mesh) and concentrated into a volume of 80 mL for further analysis, during the dry (October 2010) and wet (April 2011) seasons. Sampling was restricted to the marginal areas at depths between 80 and 150 cm.ResultsA total of 132 species was recorded among the three zooplankton groups studied. During the dry season a total of 82 species was registered and 102 species was registered for the wet season. Rotifera contributed with 66.7% of the species, followed by Cladocera (26.5%) and Copepoda (6.8%).ConclusionsThe richness of species observed was high compared to other large rivers in Brazil. In the context of current policies for water management and river diversions in northeastern Brazil, the present study highlights the importance of this river system for biodiversity conservation.

scholarly journals Green Light for Adaptive Policies on the Colorado River

Water ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 2
Author(s):  
John Fleck ◽  
Anne Castle
Keyword(s):  
Water Management ◽  
21St Century ◽  
Colorado River ◽  
Green Light ◽  
River System ◽  
Policy Option ◽  
Federal State ◽  
Management Actions ◽  
State And Local ◽  
Adaptive Policies

The Colorado River is a critical source of water supply for 40 million people in nine states spanning two nations in western North America. Overallocated in the 20th century, its problems have been compounded by climate change in the 21st century. We review the basin’s hydrologic and water management history in order to identify opportunities for adaptive governance to respond to the challenge of reduced system flows and distill the ingredients of past successes. While significant advances have been made in the first two decades of the 21st century, these past actions have not been sufficient to halt the declines in the basin’s reservoirs. We find that the mix of federal, state, and local responsibility creates challenges for adaptation but that progress can be made through a combination of detailed policy option development followed by quick action at hydrologically driven moments of opportunity. The role of directives and deadlines from federal authorities in facilitating difficult compromises is noted. The current state of dramatically decreased overall flows has opened a window of opportunity for the adoption of water management actions that move the river system toward sustainability. Specific measures, based on the existing institutional framework and on policy proposals that have circulated within the Colorado River community, are suggested.

scholarly journals Studying macrozoobenthos community and assessing the ecological status of the Tandzut River for improving hydrobiological monitoring system in Armenia

2021 ◽  
Vol 4 (4) ◽  
pp. 24-31
Author(s):  
Marine R. Dallakyan ◽  
Vardan L. Asatryan
Keyword(s):  
Water Management ◽  
Monitoring System ◽  
Benthic Macroinvertebrates ◽  
Drainage Basin ◽  
Ecological Status ◽  
River System ◽  
Water Monitoring ◽  
The Republic ◽  
The Eu ◽  
Lack Of Knowledge

The improvement of water management calls for action in the Republic of Armenia. Nowadays, the development of the hydrobiological monitoring approaches and procedures is the main goal. However, a lack of knowledge on the background conditions prevents further activities of revaluating of the methods used for water monitoring in Armenia with the EU WFD principles. Following the results of baseline studies conducted in the Debed River system, it was concluded to investigate small tributaries in order to find the most relevant and the best available site in the drainage basin. The study aims to analyse the community of benthic macroinvertebrates of the Tandzut River. We suggest the Tandzut River as a relevant substitution for the recent best available site in the area due to the ecological status of the upper reaches of the Tandzut River, which is by one category higher than the recent best available site of the Pambak River system according to BMWP index.

scholarly journals Assessment of Hydrological and Water Management Characteristics under Conditions of Uncertainty of the Formation Factors

2016 ◽  
pp. 6
Author(s):  
Keyword(s):  
Water Management ◽  
Bayesian Method ◽  
Anthropogenic Factors ◽  
The Novel ◽  
Hydrological Characteristics ◽  
Term Forecast ◽  
Study Case ◽  
Long Term Forecasting ◽  
Engineering Hydrology

The main problems of an engineering hydrology connected with the analysis of non-stationary sequences of hydrological characteristics, statistical inauthenticity of estimates, uncertainty of long-term forecasts, taking into account the need of the accounting of anthropogenic factors of the runoff alterations are discussed. The novel complicated hydrological tasks reasons have been analyzed, problems of the extreme events hydrological analysis have been classified, issues of decision making in the various uncertain conditions have been explored. The problem of the input long-term forecast reliability in the process of water management computations has been studied with the Lake Baikal level fluctuations range as a study case. Relevant issues of the hydrological characteristics assessment in the conditions of future climatic changes uncertainty have been considered. The Bayesian method of probabilistic assessment of extreme water consumption and levels on water bodies in conjunction with possibilities of the long-term forecasting based on the atmosphere circulation models are recommended.

scholarly journals Water management challenges at Mushandike irrigation scheme in Runde catchment, Zimbabwe

2018 ◽  
Vol 378 ◽  
pp. 73-78
Author(s):  
Jose A. Malanco ◽  
Hodson Makurira ◽  
Evans Kaseke ◽  
Webster Gumindoga
Keyword(s):  
Water Management ◽  
Crop Yields ◽  
Smallholder Farmers ◽  
Rank Correlation ◽  
River System ◽  
Water Shortage ◽  
Climatic Conditions ◽  
Climatic Data ◽  
Irrigation Scheme ◽  
Water Shortages

Abstract. Mushandike Irrigation Scheme, constructed in 1939, is located in Masvingo District and is one of the oldest irrigation schemes in Zimbabwe. Since 2002, the scheme has experienced severe water shortages resulting in poor crop yields. The low crop yields have led to loss of income to the smallholder farmers who constitute the irrigation scheme leading to water conflicts. The water stress at the scheme has been largely attributed to climate change and the uncontrolled expansion of the land under irrigation which is currently about 1000 ha against a design area of 613 ha. This study sought to determine the actual causes of water shortage at Mushandike Irrigation Scheme. Hydro-climatic data was analysed to establish if the Mushandike River system generates enough water to guarantee the calculated annual yield of the dam. Irrigation demands and efficiencies were compared against water availability and dam releases to establish if there is any deficit. The Spearman's Rank Correlation results of 0.196 for rainfall and 0.48 for evaporation confirmed positive but insignificant long-term changes in hydro-climatic conditions in the catchment. Water budgets established that the yield of the dam of 9.2 × 106 m3 year−1 is sufficient to support the expanded area of 1000 ha provided in-field water management efficiencies are adopted. The study concludes that water shortages currently experienced at the scheme are a result of inefficient water management (e.g. over-abstraction from the dam beyond the firm yield, adoption of inefficient irrigation methods and high channel losses in the canal system) and are not related to hydro-climatic conditions. The study also sees no value in considering inter-basin water transfer to cushion the losses being experienced at the scheme.

scholarly journals Genetic Diversity of Stratiotes aloides L. (Hydrocharitaceae) Stands across Europe

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 863
Author(s):  
Barbara Turner ◽  
Steffen Hameister ◽  
Andreas Hudler ◽  
Karl-Georg Bernhardt
Keyword(s):  
Genetic Diversity ◽  
Land Use ◽  
River System ◽  
The Past ◽  
Low Genetic Diversity ◽  
Stratiotes Aloides ◽  
Major River ◽  
Different Populations ◽  
Number Of Individuals ◽  
Wetland Habitats

Intense land use and river regulations have led to the destruction of wetland habitats in the past 150 years. One plant that is affected by the reduction in appropriate habitats is the macrophyte Stratiotes aloides which has become rare in several areas. The preservation of genetic diversity within a species is a prerequisite for survival under changing environmental conditions. To evaluate the level of genetic diversity within and among populations of Stratiotes aloides, we investigated samples from waterbodies across Europe using AFLP. Low genetic diversity among samples from the same population was found, proving that stands consist of few clones which propagate clonally. Nevertheless, most populations showed differences compared to other populations indicating that there is genetic diversity within the species. The analyzed samples formed two groups in STRUCTURE analyses. The two groups can be further subdivided and mainly follow the major river systems. For conserving the genetic diversity of Stratiotes aloides, it would thus be preferable to focus on conserving individuals from many different populations rather than conserving selected populations with a higher number of individuals per population. For reintroductions, samples from the same river system could serve as founder individuals.

Sign in / Sign up

Export Citation Format

Share Document