Difference between revisions of "Decay examples"
(Set PropertyValue: Type = low) |
(Set PropertyValue: Progress =) |
||
| (10 intermediate revisions by 3 users not shown) | |||
| Line 1: | Line 1: | ||
[[Category:Task]] | [[Category:Task]] | ||
| + | |||
| + | [[File:Trout.png|500px]] | ||
| + | |||
| + | Here are some of Tom's results for an idealized catchment. The turnover rate for the catchment is estimated by dividing the groundwater velocity by a catchment length scale. For Groundwater velocity, I used Darcy's velocity (specific discharge) divided by porosity (assumed 0.35). Darcy's velocity was estimated using the catchment hydraulic conductivity (assuming it is the same throughout the catchment and with depth---huge assumption), and using the land slope as the groundwater hydraulic gradient (big assumption, well data would be much better). For the length scale, I used 1/2 x the sqrt(catchment area), which is rough--we can do better with shapefiles and some GIS work. Given all that, here are some plots for decay rates of 0.0001 d^-1, 0.0005, and 0.001, for Big Muskelunge and Sparkling Lakes--I just wanted to try some with a significant difference in catchment size. | ||
| + | |||
| + | [[File:TH_1st_catchment_calcs.png|500px]] | ||
| + | |||
| + | |||
<!-- Add any wiki Text above this Line --> | <!-- Add any wiki Text above this Line --> | ||
<!-- Do NOT Edit below this Line --> | <!-- Do NOT Edit below this Line --> | ||
| − | {{#set: | + | {{#set: |
Type=Low}} | Type=Low}} | ||
Latest revision as of 10:35, 22 October 2015
Here are some of Tom's results for an idealized catchment. The turnover rate for the catchment is estimated by dividing the groundwater velocity by a catchment length scale. For Groundwater velocity, I used Darcy's velocity (specific discharge) divided by porosity (assumed 0.35). Darcy's velocity was estimated using the catchment hydraulic conductivity (assuming it is the same throughout the catchment and with depth---huge assumption), and using the land slope as the groundwater hydraulic gradient (big assumption, well data would be much better). For the length scale, I used 1/2 x the sqrt(catchment area), which is rough--we can do better with shapefiles and some GIS work. Given all that, here are some plots for decay rates of 0.0001 d^-1, 0.0005, and 0.001, for Big Muskelunge and Sparkling Lakes--I just wanted to try some with a significant difference in catchment size.
