Table 1.

Subsurface and overland flow and transport parameters in the various models

Subsurface modelsSurface models
ModelParameterVariableModelParameterVariable
Uniform flow and transportwater contentθUniform flow and transport (UFT)water depthh
hydraulic conductivityK(h)horizontal conductivitykh2/3/nS
hydraulic capacityC(h)constant1
Darcy’s velocityqrunoff flow rateQ
Dual-porosity modelmobile water contentθmoHorizontal and vertical mobile–immobile (HMIM and VMIM)mobile water depthhm
immobile water contentθimimmobile water depthhim
Dual-permeability modelfracture water contentθfActive–passive regions (APR)active region water depthh1
matrix water contentθmpassive region water depthh2
fracture hydraulic conductivitykf(hf)active horizontal conductivityk1h15/3/n1S
matrix hydraulic conductivityKm(hm)passive horizontal conductivityk2h25/3/n2S
matrix conc.cmconc. in the active regionc1
fracture conc.cfconc. in the passive regionc2
Dual-permeability model with mobile–immobile zoneswater content or conc. in the mobile zone of the matrix regionθm,m/cm,mAPR with HMIM and VMIM (APR-H and APR-V)water depth or conc. in the mobile zone of the active regionh1m/c1m
water content or conc. in the immobile zone of the matrix regionθim,m/cim,mwater depth or conc. in the mobile zone of the passive regionh2m/c2m
fracture water content or conc.θf/cfwater depth or conc. in the immobile zone of the active regionh1im/c1im
water depth or conc. in the immobile zone of the passive regionh2im/c2im