Of Time and Timing: Internal Drainage Boards and Water Level Management in the River Hull Valley

2021 ◽  
pp. 000-000
Author(s):  
Greg Bankoff
Keyword(s):  
Water Level ◽  
Internal Drainage ◽  
Water Level Management

Ecosystem development in Lake Volkerak-Zoom: concept and strategy

1995 ◽  
Vol 31 (8) ◽  
pp. 239-243 ◽  
Author(s):  
W. Ligtvoet ◽  
S. A. de Jong
Keyword(s):  
Water Level ◽  
Fish Stock ◽  
Ecosystem Development ◽  
Optimal Conditions ◽  
Stock Management ◽  
Key Factors ◽  
Integrated Water Management ◽  
Ecological Concepts ◽  
Freshwater System ◽  
Water Level Management

In the 6000 ha Lake Volkerak-Zoom, a new freshwater system in the estuarine southwest of The Netherlands, biomanipulation is used as a tool in ecosystem development. The basic ecological concepts for ecosystem development are described. Key factors in the integrated water management are fish stock management and water level management, geared towards creating optimal conditions for northern pike, the dominant predator in mesotrophic waters. The main aspects of the water level management and the fish stock management are outlined.

Groundwater-surface water relations in regulated lowland catchments; hydrological and hydrochemical effects of a major change in surface water level management

2019 ◽  
Vol 660 ◽  
pp. 1317-1326 ◽  
Author(s):  
Joachim Rozemeijer ◽  
Janneke Klein ◽  
Dimmie Hendriks ◽  
Wiebe Borren ◽  
Maarten Ouboter ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Level ◽  
Water Relations ◽  
Major Change ◽  
Water Level Management

Effect of 2,4-D and Various Salts on Eurasian Watermilfoil

Weed Science ◽  
1974 ◽  
Vol 22 (6) ◽  
pp. 591-594 ◽  
Author(s):  
Ronald A. Stanley
Keyword(s):  
Acetic Acid ◽  
Water Level ◽  
Aquatic Weed ◽  
Eurasian Watermilfoil ◽  
Laboratory Conditions ◽  
Mutual Antagonism ◽  
Tennessee Valley ◽  
Water Level Management ◽  
Dichlorophenoxy Acetic Acid

The management of Eurasian watermilfoil, an inimical aquatic weed in the Tennessee Valley, involves the use of water level management and herbicidal treatment with 2,4-D [(2,4-dichlorophenoxy)acetic acid]. The possible use of other chemicals to make 2,4-D more effective was tested by measuring growth of Eurasian watermilfoil under laboratory conditions with combinations of sublethal levels of 2,4-D and partially inhibitory concentrations of AlCl3, NH4Cl, Na2AsO2, BaCl2, Na2B4O7, CuSO4, HgCl2, Pb(NO3)2, NaCl, and ZnSO4. At the levels tested, BaCl2, Pb(NO3)2, and ZnSO4were only additive in effect with 2,4-D. Other compounds produced synergism at some concentrations and mutual antagonism at other levels. The greatest synergism was obtained by using HgCl2, AlCl3, and NaCl at 0.2 μM, 10.0 μM, and 200.00 mM respectively.

scholarly journals Effects of water-level management on nesting success of common loons

2013 ◽  
Vol 77 (8) ◽  
pp. 1626-1638 ◽  
Author(s):  
Steve K. Windels ◽  
Erik A. Beever ◽  
James D. Paruk ◽  
Aleya R. Brinkman ◽  
Jennifer E. Fox ◽  
...  
Keyword(s):  
Water Level ◽  
Nesting Success ◽  
Common Loons ◽  
Water Level Management

scholarly journals How water level management affects cladoceran assemblages in lakes lateral to a reservoir

2016 ◽  
Vol 67 (12) ◽  
pp. 1853 ◽  
Author(s):  
José Roberto Debastiani-Júnior ◽  
Marcos Gomes Nogueira
Keyword(s):  
Steady State ◽  
Water Level ◽  
Submerged Macrophytes ◽  
Tropical Reservoir ◽  
Main River ◽  
River Reservoir ◽  
Continuous Application ◽  
Water Level Management ◽  
Loss Of Diversity ◽  
The Right

This study analysed the effects of induced water level depletion for macrophyte control in a tropical reservoir on the cladoceran fauna of two differentially connected lateral lakes. One lake, Pedra Branca, is located in the right margin and has a narrow connection to the main river–reservoir channel as well as a higher proportion of submerged macrophytes. On the opposite margin is Lake Guaritá, which is shallower and has a wider connection. Samples were collected over 16 consecutive months, including periods before, during and after depletion. Both lakes showed closely related trends in depth, pH, DO, conductivity, chlorophyll, temperature, suspended matter, phosphorus, nitrogen, silicate and ammonium variation, although a wider amplitude in variation was observed in Pedra Branca. This lake also had higher cladoceran diversity and a predominance of Chydoridae, whereas Bosminidae prevailed in Guaritá. Depletion caused a reduction in richness and an increase of Bosminidae in both lakes, although this was more pronounced in Pedra Branca. The management moderately affected both lakes but continuous application of this procedure may lead to a shift in the system steady-state and a loss of diversity that could be difficult to reverse.

Effects of Water-Level Management and Hatchery Supplementation on Kokanee Recruitment in Lake Pend Oreille, Idaho

2018 ◽  
Vol 92 (2) ◽  
pp. 136-148 ◽  
Author(s):  
Steven L. Whitlock ◽  
Michael C. Quist ◽  
Andrew M. Dux
Keyword(s):  
Water Level ◽  
Hatchery Supplementation ◽  
Water Level Management
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