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1. Unsaturated Flow Characterization Utilizing Water Content Data Collected within the Capillary Fringe 2014

   https://ncsu.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwvV1Lb9swDBa29rId1r2AeY9CAwrs5NaRpcg-DZk3Y8eiSZCjoJeHAK1TJA6G7n_s_46U7LQJdthpJyOK_BBFkRRFfiTkzDTZ2DPnUyzOnXJmstQ4z2GXUrrMFaByjd935pDlkAvTU3BzjmFV8EVBWOPqRm80LnEQuvJiMl1cnU9hI1Wwz9vuRkVH91BPA1vwZHp7g4faFkMh79Ihse0xOUbMPFjDx5P6ajHbOWQQ-AZsn5jDd_gW0E96iShDe-oroPzvZPlJxMPVGx0j2_VecFjQV_UJ-T2MNISpYHGEh_H6FwEjMQBjDHiQ_4Uqz8mz3gCmk8ixL8gj374kTx_AIr4ibt5uEG8UzGBH6-vVT1rtYKVj1iidd8vr5S_oTRfQa00DyFbb0a-60zQ4QyzejF7mZUvByKWVvsUCS-s7WgdX5msyr7_Nqu9pXw0i1SBXulS7zBjOG8-l02ZkR1pIZzIhclEy67iW3IpyLJn3otCukYXNjSxKjdW1EejtDaFlZjQeLaEVzGXelMwb0M6lyawpfS4TUsVpVgPF1SVDDD6wE0GfK4ZhsUzdN_GDH1wqwRJyNvCIuo2YIQr2WjhHCudIxTlKyBfkn10XBPoODav1D9XLDbivaUAdCZbpDB-gpS3HHlEiTQ7GGk_IJ-Q-heKog5noec-uWo_AXmqSjwUmrmcwNnnIoHuvPvjTagVMBh89Egn5iHx3T5O_DObtP_R5R54gAaMD6z056tZb_4EcIe-f9qsRr7PqcnoafCN_AB85UB4

   Baehr, Arthur L.; Reilly, Timothy J.

   Air, Soil And Water Research, Vol. 2014, Issue 7.

   An analysis is presented to determine unsaturated zone hydraulic parameters based on detailed water content profiles, which can be readily acquired during hydrological investigations. Core samples ... Read more

   An analysis is presented to determine unsaturated zone hydraulic parameters based on detailed water content profiles, which can be readily acquired during hydrological investigations. Core samples taken through the unsaturated zone allow for the acquisition of gravimetrically determined water content data as a function of elevation at 3 inch intervals. This dense spacing of data provides several measurements of the water content within the capillary fringe, which are utilized to determine capillary pressure function parameters via least-squares calibration. The water content data collected above the capillary fringe are used to calculate dimensionless flow as a function of elevation providing a snapshot characterization of flow through the unsaturated zone. The water content at a flow stagnation point provides an in situ estimate of specific yield. In situ determinations of capillary pressure function parameters utilizing this method, together with particle-size distributions, can provide a valuable supplement to data libraries of unsaturated zone hydraulic parameters. The method is illustrated using data collected from plots within an agricultural research facility in Wisconsin. Read less

   Journal Article  |  Full Text Online

2. Unsaturated Flow Characterization Utilizing Water Content Data Collected within the Capillary Fringe 2014

   https://ncsu.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwrV1LT9wwEB7BcoED5VGpvCIj9Ro2sZN4fUDVEhpRegHCaqVekB070koouyxBCKT-985kk2V76amnSMnESvyYmW88_gbgqymDxHHrfCrO7UfcBL6xLkKUomxgB2hyjfs7mAO33VmYdnw7tdjoajstKEzeR99FITxAhPFt9uRT4SjaYO2qaOi2uoI9D7nk8Tps8BCtUw82hvfpTb4MvBDBDfo4iyR4VOGyP8zHd_OzHHEZ0fGtqmTe2pnsE_zuvrBJL6GiBqt59v2G27AhtOh4HP_r3-zAduugsuFiRu3Cmqv2YGuFtnAf7Kh6Jj5QdFMtyx6nryxd0j4vTnWyUT15nLyjNBuj1Jw1JFhVzS51rVkTrCjoZYoCTyqGTihL9YwKIM3fWNaEGj_DKPt-n175bbUGfxaKsPYLzWMXqkIkirsiCctEJ9EA0Z6NgjKSSsuBjctSIr4zsSy5SpROhFSxsCKMjRNfgKnAaNr6IS81kqLElgxaT2WCwign5AEcd3350K6154ePjjyA0-VjXCW09aErN30hmTCRQiGcOPx3E0ewiS5RtAiyHEOvnr-4E-jROHs4ky6u08xrZxReL37mwzuvwfEeMYyO8d5V-iP75VEOaf4H8VLlag

   Baehr, Arthur L; Reilly, Timothy J

   Air, Soil And Water Research, Vol. 7, pp. 47 - 52.

   An analysis is presented to determine unsaturated zone hydraulic parameters based on detailed water content profiles, which can be readily acquired during hydrological investigations. Core samples ... Read more

   An analysis is presented to determine unsaturated zone hydraulic parameters based on detailed water content profiles, which can be readily acquired during hydrological investigations. Core samples taken through the unsaturated zone allow for the acquisition of gravimetrically determined water content data as a function of elevation at 3 inch intervals. This dense spacing of data provides several measurements of the water content within the capillary fringe, which are utilized to determine capillary pressure function parameters via least-squares calibration. The water content data collected above the capillary fringe are used to calculate dimensionless flow as a function of elevation providing a snapshot characterization of flow through the unsaturated zone. The water content at a flow stagnation point provides an in situ estimate of specific yield. In situ determinations of capillary pressure function parameters utilizing this method, together with particle-size distributions, can provide a valuable supplement to data libraries of unsaturated zone hydraulic parameters. The method is illustrated using data collected from plots within an agricultural research facility in Wisconsin. Read less

   Journal Article  |  Full Text Online

3. An Updated Model of Induced Airflow in the Unsaturated Zone 1995

   https://ncsu.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnV1LS8NAEB60PejFN1hfLCLiJTTJxqSLp1isHsRDaSn0EnazGxRLWlpFvfS3O7NNYnsQxFsek5DMzu7M7Ox-H8CFytzQ-No4RM7tBL5yHaVNgFmK0K5uoctVZnUy54fqa4EPUU24Uc-w4zV1cKlmBdiAaIpg0CX3wteh7lFpDU15Po-rAgLGBVFZXKYgpwQVWn50xRXVSaufSyEqL3xMZxtM-XV2aQkRGiyvsW9aXEMLZlFiOP7rT3ZgqwhCWbywml1YM_kebJR7lGd4XHCjP3_tw02cs_6EJgY0I-a0ERtnjBg_UrwQv0yz0fiDveQMI0nWz2cEFGplh-PcHEC_c9drPzgF5YIjeSA8R3qhFtgpM9MKpRKpUZFuacxaMI_CWxzPM09JT2ZR6mIeHhIAvAxST3KZGvSCh8CEqyTVbyjUDCKeCd8odIFCuakShkcNOC_VnkwWkBqJLYX7IqmU0YBL2yCVhJy-0hq06DoZPN0nOCp2HnnvNhk24Mrq9vdXJYNuuxtipnv0d9Fj2Cz3rrveCdTepu_mFGrU5GfW0L4BeFXTfw

   Baehr, Arthur L.; Joss, Craig J.

   Water Resources Research, Vol. 31, Issue 2, pp. 417 - 421.

   Simulation of induced movement of air in the unsaturated zone provides a method to determine permeability and to design vapor extraction remediation systems. A previously published solution to the ... Read more

   Simulation of induced movement of air in the unsaturated zone provides a method to determine permeability and to design vapor extraction remediation systems. A previously published solution to the airflow equation for the case in which the unsaturated zone is separated from the atmosphere by a layer of lower permeability (such as a clay layer) has been superseded. The new solution simulates airflow through the layer of lower permeability more rigorously by defining the leakage in terms of the upper boundary condition rather than by adding a leakage term to the governing airflow equation. This note presents the derivation of the new solution. Formulas for steady state pressure, specific discharge, and mass flow in the domain are obtained for the new model and for the case in which the unsaturated zone is in direct contact with the atmosphere. Read less

   Journal Article  |  Full Text Online

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