Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
EVALUATION OF IN-SITU SATURATED HYDRAULIC CONDUCTIVITY IN A COASTAL HUMID TROPICAL WETLAND
Measurement of groundwater-stream interactions is increasingly recognised as important to understand hydrological behaviour of wetlands. Hydraulic conductivity (K) of saturated soil is an important parameter in modelling the hydrological processes in wetlands. The present study aims at estimating the hydraulic conductivity of the coastal humid tropical wetland near National Institute of Technology Karnataka (NITK) Surathkal, Mangalore, India. The paper describes the technique and method used to estimate the hydraulic conductivity of the coastal humid tropical wetlands. Standard measurement techniques are often available, but feasible only in small fields, in areas with easy access, or on laboratory samples of substrata. A technique to obtain the estimates of hydraulic conductivity has been used by installing four Piezometers of 2.5 cm diameter at three different average depths (−45, −70 and −95 cm) of 15 cm screen opening and another (at -70 cm) of 30 cm screen opening within a meter depth of strata. Water level recovery measurements were made in these Piezometers and were found consistent with respect to time of recovery and show the correlation coefficient, R2 in between 0.9289 to 0.9955. Based on the best fit line (regression equation), the hydraulic conductivity of the wetland were computed for each site and the K values were found to be in the range of 3.1434×10 5cm/s to 36.07×10 5cm/s in the study area. The hydraulic conductivity as estimated was found to be varied over several orders of magnitude in each of the compartments but the deeper wetland soil was clearly the most permeable due to high sand content in the study area. It has been also observed that, K values at top and middle substrata were of same order in each site and then increased with increasing soil depth from middle to bottom substrata.
EVALUATION OF IN-SITU SATURATED HYDRAULIC CONDUCTIVITY IN A COASTAL HUMID TROPICAL WETLAND
Measurement of groundwater-stream interactions is increasingly recognised as important to understand hydrological behaviour of wetlands. Hydraulic conductivity (K) of saturated soil is an important parameter in modelling the hydrological processes in wetlands. The present study aims at estimating the hydraulic conductivity of the coastal humid tropical wetland near National Institute of Technology Karnataka (NITK) Surathkal, Mangalore, India. The paper describes the technique and method used to estimate the hydraulic conductivity of the coastal humid tropical wetlands. Standard measurement techniques are often available, but feasible only in small fields, in areas with easy access, or on laboratory samples of substrata. A technique to obtain the estimates of hydraulic conductivity has been used by installing four Piezometers of 2.5 cm diameter at three different average depths (−45, −70 and −95 cm) of 15 cm screen opening and another (at -70 cm) of 30 cm screen opening within a meter depth of strata. Water level recovery measurements were made in these Piezometers and were found consistent with respect to time of recovery and show the correlation coefficient, R2 in between 0.9289 to 0.9955. Based on the best fit line (regression equation), the hydraulic conductivity of the wetland were computed for each site and the K values were found to be in the range of 3.1434×10 5cm/s to 36.07×10 5cm/s in the study area. The hydraulic conductivity as estimated was found to be varied over several orders of magnitude in each of the compartments but the deeper wetland soil was clearly the most permeable due to high sand content in the study area. It has been also observed that, K values at top and middle substrata were of same order in each site and then increased with increasing soil depth from middle to bottom substrata.
EVALUATION OF IN-SITU SATURATED HYDRAULIC CONDUCTIVITY IN A COASTAL HUMID TROPICAL WETLAND
Nyamathi, Shivakumar J. (Autor:in) / Hegde, A. Vittal (Autor:in)
ISH Journal of Hydraulic Engineering ; 12 ; 78-93
01.01.2006
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Estimation of Saturated Hydraulic Conductivity
| British Library Conference Proceedings | 1996
Hydraulic Conductivity of Partially Saturated Semi-Arid Tropical Black Clay from Consolidation Tests
| British Library Conference Proceedings | 2016