Effects of cypress knee roughness on fl ow resistance and discharge estimates of the Turkey Creek watershed
Journal Title: Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation - Year 2017, Vol 49, Issue 3
Abstract
In this study effects of cypress knees as vegetation resistance factor on Turkey Creek watershed discharge calculation were analyzed. The Turkey Creek watershed is a 3rd order stream system draining an approximate area of 5,240 ha. It is located at 33°08' N latitude and 79°47' W longitude, approximately 60 km north-west of City of Charleston in South Carolina (USA). Turkey Creek (WS 78) is typical of other watersheds in the south Atlantic coastal plain. In the case of Turkey Creek watershed, one of the main channels and riparian fl oodplain vegetation contains cypress trees. Cypress trees live in moist or swampy regions along the Atlantic coastal plain. The cypress trees are characterized by the unique root system called knees that appear just above the water line, up to 1.2 m above water surface. This study is conducted to examine the effects of roughness of cypress knee as related to its shape (diameter and height) on discharge estimates of the Turkey Creek watershed. Hydraulic characteristics of the cypress knees were determined by fi eld inventory in selected cross-section along the main stream channel. The Pasche method was used to calculate the total Darcy–Weisbach friction factor in discharge capacity calculation of the study watershed. The results of this study show that the effect of vegetation shape in the Pasche approach is signifi cant. If the variability of vegetation stem diameter is taken into consideration in the calculations, an increase by 10–32% in the values of friction coeffi cients occurs.
Authors and Affiliations
DOROTA MIROSLAW-SWIATEK, DEVENDRA M. AMATYA
Keywords
Related Articles
- EP ID EP591939
- DOI -
- Views 101
- Downloads 0
Terrestrial Laser Scanning (TLS) as a detection method of the natural river valley microtopography – case study of the Upper Biebrza
This paper concerns the use of Terrestrial Laser Scanning (TLS) methods and the Geographic Information Systems (GIS) analysis to determine microtopography of a natural river valley, case study of the upper Biebrza valley...
Określenie właściwości mechanicznych gruntu stabilizowanego wapnem hydratyzowanym
Effects of environmental changes and human impact on the functioning of mountain river channels, Carpathians, southern Poland
In the northern slope of the Carpathian Mountains and in their foreland, river and stream channels have been significantly transformed by human impact. These transformations result from changing land use in river basins...
Wpływ czasu pielęgnacji na wytrzymałość na ścinanie fluidalnych popiołów lotnych
W pracy przedstawiono wyniki badań wpływu zagęszczenia oraz czasu pielęgnacji powietrznej i wodnej na kąt tarcia wewnętrznego i spójność fluidalnego popiołu lotnego ze zsypu Elektrowni „Połaniec”. Stwierdzono, że wzrost...
Application of the Bayesian Belief Nets in dam safety monitoring
The systems for earth dam monitoring should enable measurements of basic physical parameters describing the behavior of the structure, including: soil water pressure, soil stress, displacements, leaks, and drainage disch...