Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - A distribution function approach to water flow in soil macropores based on kinematic wave theory
AU - Germann, Peter F.
AU - Beven, Keith
PY - 1986/1/15
Y1 - 1986/1/15
N2 - Kinematic wave theory is adapted to gravity-driven flow in narrowly defined macropore groups. The frequency distribution of macropore conductance, b (dimensions L T-1), is obtained by superimposing the predicted drainage hydrographs from the individual groups of macropores and matching predicted outputs to observed drainage hydrographs. The time period over which this concept applies is limited to about 1.5 times the duration of the water input to the soil surface. The drainage hydrographs from four different soils, using three different measuring devices, were analyzed accordingly. The analysis suggests that between 10-2 and 0.2 of the input is required to supply water to the macropore system, while a parameter controlling losses to the matrix varies over only a small range.
AB - Kinematic wave theory is adapted to gravity-driven flow in narrowly defined macropore groups. The frequency distribution of macropore conductance, b (dimensions L T-1), is obtained by superimposing the predicted drainage hydrographs from the individual groups of macropores and matching predicted outputs to observed drainage hydrographs. The time period over which this concept applies is limited to about 1.5 times the duration of the water input to the soil surface. The drainage hydrographs from four different soils, using three different measuring devices, were analyzed accordingly. The analysis suggests that between 10-2 and 0.2 of the input is required to supply water to the macropore system, while a parameter controlling losses to the matrix varies over only a small range.
UR - http://www.scopus.com/inward/record.url?scp=0022470120&partnerID=8YFLogxK
U2 - 10.1016/0022-1694(86)90191-5
DO - 10.1016/0022-1694(86)90191-5
M3 - Journal article
AN - SCOPUS:0022470120
VL - 83
SP - 173
EP - 183
JO - Journal of Hydrology
JF - Journal of Hydrology
SN - 0022-1694
IS - 1-2
ER -