Analytical compensation between DTM grid resolution and effective values of staurated hydraulic conductivity within the TOPMODEL framework

Dependence of bare soil albedo on soil moisture on the moraine of the Zongo glacier (Bolivia): Implications for land surface modeling

“…Figure 4 also shows that the most important aspect is the mean value of the TID, whereas the amplitude of variations is not strongly affected by the TID. This result is consistent with the wide body of literature about TOPMODEL's sensitivity to the TID, including the conclusion of Franchini et al [1996], who demonstrated that, apart from the sensitivity to the mean topographic index, “TOPMODEL shows such limited sensitivity to the basin's actual index curve that it is possible (…) to replace it with other curves taken within a relatively broad band, without significantly altering the sequence of discharges generated.” In contrast, the latter is significantly influenced by the mean topographic index, which depends as much on local topography as on the DEM resolution, so that it is mandatory to calibrate the transmissivity parameters of TOPMODEL [e.g., Wolock and McCabe , 1995; Saulnier et al , 1997; Ducharne , 2009].…”

Effects of DEM resolution on the calculation of topographical indices: TWI and its components

“…This means that spatial predictions of local hydrological state variables are a direct function of the spatial TWI variation. Previous studies have also demonstrated that simulated catchment runoff is affected by the catchmentwide distribution function of TWI values (Wolock and Price, 1994;Franchini et al, 1996;Saulnier et al, 1997;Brasington and Richards, 1998;Thieken et al, 1999;Vivoni et al, 2005), although the differences in simulated runoff sometimes can be compensated for by using different parameter values (Armstrong and Martz, 2003;Saulnier and Datin, 2004).…”

“…Lassueur et al (2006) found that a resolution of 1 m is too fine for predicting plant species richness. Saulnier et al (1997) observed an increased mean of the TWI with increasing DEM grid size. Similar results were obtained by Wolock and McCabe (2000) who found that the differences in the average values of the topographic characteristics computed from 100 and 1000 m resolutions can be corrected with simple linear equations.…”

Analysis of the hydrological behaviour of an urbanizing basin

“…The time step chosen to compute the transfer function according to the FDTF‐ERUHDIT method is 1/5 to 1/3 of the time to peak. This method has identified the transfer function in a number of catchment studies (Moussa, ; Saulnier et al ., ; Rodriguez et al ., ). Assessment of the hydrological behaviour of the various groups of events (Gi)…”