title: An integrated laboratory method to measure and verify directional hydraulic conductivity in fine-to-medium sandy sediments.
abstract: The constant-head permeameter test (CHPT) is widely used in sandy samples as a standard method in the laboratory to investigate hydraulic conductivity (K). However, it neither can be used to consistently determine directional hydraulic conductivity (DHC) nor guarantee the comparability of measured K values of samples with different sizes. Therefore, this paper proposes an integrated laboratory method, called modified CHPT (MCHPT), for the efficient determination and verification of consistent DHC values in fine-to-medium sandy sediments, based on a new methodological framework. A precise and standardized procedure for preparing the experimental setup of MCHPT was conducted, based on the integrated experimental setup of CHPT and tracer tests. Moreover, a formula was yielded for the time-optimized sample saturation control. In comparison with grain size-based methods, the validity of consistent Kh and Kv values determined by MCHPT was convincing.
authors.affiliation: Institut für Geologische Wissenschaften, Freie Universität Berlin, 12249 Berlin, Germany.
authors.forename: Jialiang
authors.initials: J
authors.lastname: Cai
authors.forename: Thomas
authors.initials: T
authors.lastname: Taute
authors.forename: Enrico
authors.initials: E
authors.lastname: Hamann
authors.forename: Michael
authors.initials: M
authors.lastname: Schneider
mesh_terms: D004784:Environmental Monitoring; D019015:Geologic Sediments; D060587:Groundwater; D057446:Hydrodynamics; D010316:Particle Size; D014872:Water Movements