November 2011 monitoring

Cloudy and cool.  And no significant rain since the day after last month’s monitoring. Surprisingly, there was still some flow in the storm culvert (albeit with a scummy surface) .  There’s dead algae and new surface algae at the entrance from the culvert, near the sample site and upstream. Possibly from last month’s rain? The water level under the bridge hasn’t changed noticeably, as I look back at last month’s photos.

Along with the obviously dead plants up and down the stream, others are turning colors – it’s sometimes hard to decide if they are dying or the leaves are just turning colors before they drop for the winter.

There are some possibly invasive plants starting to cover the water between the trail and the bridge. LCRA tentatively identified them as water primrose

The stats for this visit:

• Air temp: 19 C (66 F)
• water temp 13 C (55 F)
• Dissolved Oxygen 2.33
• pH 7.5 (usual)
• Nitrates 0.25 (usual – low, which is good)

sample pool from bank

sample pool & downstream from north bank

downstream of sample site

downstream of sample site

sample site & south bank from north bank

sample site & south bank, scummy water

trail area & under bridge from north bank

closeup of maybe invasive plants

closeup of stream between trail & bridge

low water under bridge

culvert flow into creek

side view of culvert

stream between culvert & bridge

view upstream of culvert & beyond

view of culvert & under bridge

culvert area & under bridge

stream by culvert

upstream view thru culvert plants

storm drain creek-scummy water

waterfall area just a trickle

waterfall area closeup

upstream view from waterfall

upstream view

new algae above waterfall

dead plants by stream

downstream view towards bridge

downsteam view towards bridge

dissolved oxygen 2-2