Limnology of Taylor Creek impoundment with reference to other water bodies in Upper St. Johns River Basin, Florida

1978 ◽  
Keyword(s):  
River Basin ◽  
Water Bodies ◽  
Taylor Creek

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

Development of Dialog System Model for Eutrophication Control between Discharging River Basin and Receiving Water Body – Case Study of Lake Sagami (Japan)

1989 ◽  
Vol 21 (12) ◽  
pp. 1821-1824
Author(s):  
M. Suzuki ◽  
K. Chihara ◽  
M. Okada ◽  
H. Kawashima ◽  
S. Hoshino
Keyword(s):  
Water Management ◽  
Water Quality ◽  
Expert System ◽  
River Basin ◽  
Water Body ◽  
Water Bodies ◽  
Quality Data ◽  
Pollution Load ◽  
Water Quality Data ◽  
Receiving Water

A computer program based on expert system software was developed and proposed as a prototype model for water management to control eutrophication problems in receiving water bodies (Suzuki etal., 1988). The system has several expert functions: 1. data input and estimation of pollution load generated and discharged in the river watershed; 2. estimation of pollution load run-off entering rivers; 3. estimation of water quality of receiving water bodies, such as lakes; and 4. assisting man-machine dialog operation. The program can be used with MS-DOS BASIC and assembler in a 16 bit personal computer. Five spread sheets are utilized in calculation and summation of the pollutant load, using multi-windows. Partial differential equations for an ecological model for simulation of self-purification in shallow rivers and simulation of seasonal variations of water quality in a lake were converted to computer programs and included in the expert system. The simulated results of water quality are shown on the monitor graphically. In this study, the expert system thus developed was used to estimate the present state of one typical polluted river basin. The river was the Katsura, which flows into Lake Sagami, a lake dammed for water supply. Data which had been actually measured were compared with the simulated water quality data, and good agreement was found. This type of expert system is expected to be useful for water management of a closed water body.

scholarly journals Daphnia diversity in water bodies of the Po River Basin

2016 ◽  
Author(s):  
Silvia Marková ◽  
Catia Maurone ◽  
Erica Racchetti ◽  
Marco Bartoli ◽  
Valeria Rossi
Keyword(s):  
River Basin ◽  
North American ◽  
Water Bodies ◽  
12S Rrna ◽  
Long Distance ◽  
Po River ◽  
The North ◽  
North Eastern ◽  
Northern European Russia ◽  
Po River Basin

<p>Shallow water bodies dominate the areal extent of continental waters and host a proportion of biodiversity higher than the percentage of Earth’s surface they cover. <em>Daphnia</em> is a key component of small aquatic ecosystems food webs. Here we present the result of a survey in 24 ponds located in the core of Po river Basin, to assess the actual spreading of <em>Daphnia</em> species in one of the most productive areas of the Northern hemisphere. By using diagnostic genetic markers (<em>12S rRNA </em>and <em>ND5 </em>genes) we identified five <em>Daphnia</em> species: <em>D. ambigua</em>, <em>D. curvirostris</em>, <em>D. longispina</em>, <em>D. obtusa</em> and <em>D. pulex </em>in fourteen ponds. Additional analyses of two nuclear genes (<em>LdhA</em> and <em>Rab4</em>) revealed that <em>D. pulex</em> in the study area is native European strain. In opposite, <em>D. ambigua</em> shared haplotype with the North-Eastern American lineage that was introduced to Europe by long-distance dispersal. In the Po river Basin we identified a highly divergent lineage of <em>D. longispina </em>group that formed a clade with individuals from northern European Russia and might represent a new <em>Daphnia </em>species. <em>Daphnia</em> species in the Cremona province have European origin, except for <em>D. ambigua</em> which is a North American species spreading across Europe. Future attention will require monitoring of invasive species, particularly <em>D. ambigua</em> and the North American invasive clone of <em>D. pulex </em>that is already present in Northern Italy. </p>

scholarly journals Agricultural aspects in river basin management plans

2012 ◽  
pp. 149-152
Author(s):  
János Fehér
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Organic Material ◽  
River Basin Management ◽  
Water Bodies ◽  
Basin Management ◽  
River Basin Management Plans ◽  
Management Plans ◽  
Surface Water Bodies ◽  
The Impact

In the European Region agriculture is the second largest water user after power industry cooling water use. As part of the implementation of Water Framework Directive EU Member States prepared their river basin management plans by the end of 2009 or first half of 2010, In these plans impacts of agriculture on water bodies have received attention. The detailed information elaborated in the plans by countries and river basin districts were uploaded into the WFD section of the WISE system. This database provides opportunity for multi-criteria analysis for different water types. The paper discusses the effects of agriculture on hydromorphological pressures and impacts affecting surface water bodies. It was pointed out that among the pressures affecting European surface water bodies the hydromorphological and diffuse pressures represent the highest ratios (Figure 1). Within the hydromorphological pressures affecting classified surface water bodies the ratio of pressures related to agricultural activities is low,it does not exceed 1% at European level. In case of Hungary the agriculture related river management pressures effect about 80% of the surface water bodies, which is much higher than the corresponding European average. The agricultural water abstractions affect about 10% of the Hungarian surface water bodies (Figures 2 and 3). The river and lake water bodies are impacted in significant ratio by nutrient enrichments and organic material enrichments, while in case of river water bodies the impact of organic material enrichments is also significant (Figures 4 and 5).

LUKIANETS O.I., GREBІN V.V. TIME DYNAMICS OF WATER BALANCE COMPONENTS IN THE PSEL RIVER BASIN

2021 ◽  
pp. 28-36
Author(s):  
O.I. Lukіanets ◽  
V.V Grebіn
Keyword(s):  
Water Balance ◽  
River Basin ◽  
Water Flow ◽  
Water Bodies ◽  
Water Runoff ◽  
Water Balance Components ◽  
Total Evaporation ◽  
Modern Period ◽  
The Relationship ◽  
The Town

In the article, in order to identify the generalized role of changes that occurred in the Psel River basin with such climatic indicators as air temperature, amount of precipitation, their form of precipitation, the structure of water bodies feeding, as well as water flow in the modern period, the average water balance for a long-term period was calculated the Psel river basin near the town of Gadyach. In general, the water balance equation shows the ratio of water input and consumption within a river basin, taking into account changes in its reserves over a selected time interval and allows one to assess the relationship of its individual components. In the article identifies changes in the ratio between the inflow (amount of precipitation) and consumption of water (total evaporation and runoff) for two periods – the climatic norm of 1961-1990 and modern 1990-2019. Analysis of the temporal dynamics of the water balance components of the Psel river basin showed that the values of the water balance components within the Psel river basin near the town of Gadyach in the modern period have decreased in comparison with the period of the climatic norm – the amount of precipitation by 6,2%, water flow by 17,5%, evapotranspiration by 1,8%. But, analyzing the relationship between the inflow and outflow of water in the basin for the two study periods 1961-1990 and 1990-2019, it can be stated that during the period of the climatic norm, the percentage of water flow from the total precipitation was greater (coefficient water flow 16.2%) than in the modern period (coefficient water flow 14.2%). With regard to total evaporation in water-balance ratios, its share in the water-balance ratio has increased over the modern period (1990-2019). If during the period of climatic normal (1961-1990) the aridity coefficient was 83.8%, then in the modern period, it is 85.8%. That is, the “redistribution” of the water volumes of atmospheric precipitation took place towards the total evaporation with a decrease in the volume of water used to form the water runoff. For the basin of the river Psel – the city of Gadyach in the modern period on the average ≈ 11 mm (or ≈ 130000000 m3) evaporate instead of replenishment of water resources. In the previous period of 1961-1990, on the contrary, ≈ 12 mm (or 136000000 m3) did not evaporate, but flowed into the water bodies of the basin.

A cost-efficient riverscape methodology for GIS characterisation and planning of river restoration in Scandinavia 

2021 ◽  
Author(s):  
Jo Halvard Halleraker ◽  
Janos Steiner ◽  
Ulrich Pulg ◽  
Johan Kling ◽  
Knut Alfredsen
Keyword(s):  
High Resolution ◽  
River Basin ◽  
River Restoration ◽  
Action Plan ◽  
Water Bodies ◽  
River Continuum ◽  
Gis Techniques ◽  
Key Species ◽  
Management Regimes ◽  
Cost Efficient

&lt;p&gt;Fundamental assessment and understanding of fluvial geomorphological processes are crucial for a sustainable management of riverine ecosystems. There is a huge riverscape diversity across Scandinavia; from low gradient river habitats in the lowland (e.g. meanders and river delta in South of Sweden) to high alpine, post-glacial and morphologically highly variable rivers with water falls in West-Norway.&lt;/p&gt;&lt;p&gt;River basin managers in Sweden and Norway, are facing many of the same challenges related to types of pressures, biogeography, restoration needs and a huge number of water bodies. We have in this project exemplified how unbiased science-justified descriptors and indicators that are realistic to generate for many thousand rivers according to the EU Water Framework Directive (WFD), can be used as basis for ecosystem-based management.&amp;#160;&amp;#160;&lt;/p&gt;&lt;p&gt;The coverage of high-resolution laser-scanning-data (lidar) surveyed for mapping purposes are soon covering most of the river basin districts in both countries. Green lidar penetrating water is so far only surveyed only in limited pilot areas. Therefore, we have mainly generated riverscape features from grey LIDAR in all the characterised catchments, like e.g. i) river slope, iii) sinuosity, iv) valley confinement and v) substrate composition.&lt;/p&gt;&lt;p&gt;Cluster riverscape analysis and assessment of more than 7100 unique river segment and ca 2041 km of rivers in 10 diverse catchments in Norway, and about 11 000 river segments and ca 1930 km of rivers in three catchments in Sweden have been included in the GIS databases. These rivers have different management regimes (e.g. several permanent protected rivers in Norway) and key species in focus (several national salmon rivers). Still some of the same hymo pressures (e.g. lack of lateral and/or longitudinal river continuum) seems to be quite prominent across management regimes, and therefore an intensified action plan for river restoration seems to be needed.&lt;/p&gt;&lt;p&gt;We have demonstrated that our GIS-techniques by combining high resolution lidar data and the river continuum concept is a cost-efficient methodology for assessing river habitats for both riparian and riverine biota in riverscapes of Scandinavia. By combining lidar with other georeferenced data publicly available like geomorphological maps, pressure data (e.g., road culverts), segmentations and semi-automatic GIS-techniques, huge areas (like catchments of several thousand km&lt;sup&gt;2&lt;/sup&gt; and hundreds of river water bodies)&amp;#160; can be assessed in an objective transparent way already publicly available.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Application&lt;/strong&gt;&lt;/p&gt;&lt;p&gt;The methodology and GIS database we have generated in this project are relevant for managements issues such as&lt;/p&gt;&lt;p&gt;a) defining &lt;strong&gt;reference conditions&lt;/strong&gt; (to classify ecological conditions)&lt;/p&gt;&lt;p&gt;b) large scale analysis of habitat degradation of riverine and riparian biodiversity, (consistent river typologies &amp;#8211; &quot;&lt;strong&gt;digital twins&lt;/strong&gt;&quot;)&lt;/p&gt;&lt;p&gt;c) pressure index to pinpoint more accurate and &lt;strong&gt;sustainable restoration&lt;/strong&gt; strategies and measures, that also acknowledge climate adaptation (e.g. natural flow retention measures)&lt;/p&gt;&lt;p&gt;d)&lt;strong&gt; identifying significance of physical alterations (hymo pressures&lt;/strong&gt; - e.g. longitudinal barriers for fish) vs climate change effects (e.g. due to changes in ice break up)&lt;/p&gt;&lt;p&gt;e)&lt;strong&gt; biodiversity management&lt;/strong&gt;; habitat fragmentation, rare vs common habitat types (for updating next version of national Red lists of nature types and/or endangered riverine species)&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

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