Home About Browse Search
Svenska


Saturated horizontal hydraulic conductivity in an acid sulphate soil

a minor field study in the Vietnamese Mekong delta

Uppenberg, Stefan and Wallgren, Oskar and Åhman, Markus (1997). Saturated horizontal hydraulic conductivity in an acid sulphate soil. Uppsala: (NL, NJ) > Dept. of Soil Sciences > Div. of Hydrotechnics, Sveriges lantbruksuniversitet. Avdelningsmeddelande / Sveriges lantbruksuniversitet, Institutionen för markvetenskap, Avdelningen för lantbrukets hydroteknik ; 97:1
[Report]

[img]
Preview
PDF
2MB

Abstract

This study was made within the Management of Acid Sulphate Soils Project (MASSP) and was carried out at Tan Thanh Experimental Farm. The Mekong delta, situated in the southern part of Vietnam, is an increasingly important area for agriculture and aquaculture in Vietnam. Approximately half of the area is covered with acid sulphate soils. These soils give rise to problems because of their acidity which effects rice cultivation and water quality negatively. Due to these problems there is a need for better understanding of the water balance and the groundwater movements in these soils. The objective of this study was to study the saturated horizontal hydraulic conductivity, K, and the effective porosity, S, of the soil, in order to provide data to the physical and chemical models developed by MASSP. Steady state pumping tests gave K-values between 12 and 37 m/day and transient flow pumping tests gave K-values between 12 and 41 m/day. Estimated mean K was 23 m/day for both methods which is a somewhat higher value than previous measurements have indicated. The estimated effective porosity varied between 0.006 and 0.080. Guyon's and Theis' methods of calculation gave mean values 0.008 and 0.030 respectively. Both methods for calculating K are sensitive to variations in depth ofthe aquifer. A sensitivity analysis was performed to analyse how sensitive a computer model of the soil can be to variations in K, and thereby how important reliable K-values are when simulating water flows through the soil.

Authors/Creators:Uppenberg, Stefan and Wallgren, Oskar and Åhman, Markus
Title:Saturated horizontal hydraulic conductivity in an acid sulphate soil
Subtitle:a minor field study in the Vietnamese Mekong delta
Series/Journal:Avdelningsmeddelande / Sveriges lantbruksuniversitet, Institutionen för markvetenskap, Avdelningen för lantbrukets hydroteknik (0282-6569)
Year of publishing :1997
Number:97:1
Number of Pages:45
Place of Publication:Uppsala
Publisher:Institutionen för markvetenskap, Sveriges lantbruksuniversitet
ISSN:0282-6569
Language:English
Publication Type:Report
Refereed:No
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Agronomy
Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Soil science
Obsolete subject words > INTERDISCIPLINARY RESEARCH AREAS > Water in nature and society
Keywords:Hydraulic conductivity, Acid soil, Sulphate soil, Saturated, Vietnam
URN:NBN:urn:nbn:se:slu:epsilon-8-513
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-8-513
ID Code:4056
Department:(NL, NJ) > Dept. of Soil Sciences > Div. of Hydrotechnics
Deposited By: Anna Nilsson
Deposited On:04 Jun 2010 00:00
Metadata Last Modified:02 Dec 2014 10:27

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits