In the smaller-scale regime, the grid intervals are much smaller than the turbulence scale, such that the energy-containing eddies are resolved--the large-eddy simulation (LES) and direct numerical simulation (DNS) approaches.
At larger scales (perhaps grid intervals >10 km or so), the success demonstrated by NWP forecast models implies that the smoothed fields reasonably well represent the dynamics at those scales, seemingly justifying the neglect of higher-order terms.
The threshold length of valley-fill method has similar significance of the grid interval of grid method.
The Figure 4 presents summit level map for the central region of State of Rio de Janeiro, Brazil, based on grid interval of 4 km (AIRES et al., 2012).
Along the scarp, some mega-landslide blocks are observed in the summit level map of the grid interval of 2 and 1 km.
The Figure 6 shows the summit level map of grid interval of 490 m using the updated topographic data of the Aster Gdem.
If the data were very dense in Cameroon, many grid intervals
would have been tested.
I now use a computer spreadsheet program to generate the grids for any value of Cn and for any values of the two grid intervals
, but the tests my original technique used are still valid for determining the validity of scales extracted from these grids.