Fixed bug from not deleting temp table in overlap_stats.py

Signed-off-by: nicolejeansmith <nicole.j.smith@gmail.com>
Took out testing print statements from upstream_lakes.py

Signed-off-by: nicolejeansmith <nicole.j.smith@gmail.com>
PreprocessNWI.py put everything in functions

Signed-off-by: nicolejeansmith <nicole.j.smith@gmail.com>