Ideas for Laguna Chacas lake water monitoring

We are headed to Laguna Chacas to implement a lake water quality assessment. Here are some links to the ideas that Javier has suggested.

Water Quality
A very good low cost fecal bacteria indicator:
The H2S bacteria test

Riffle sampler for aquatic macroinvertebrates.
Something similar to the Hester-Dendy sampler



Aerial Mapping 
Kite or Balloon mapping:
http://www.publiclab.org/wiki/balloon-mapping
The biggest expense is helium. You can make balloons from emergency mylar sleeping bags.
We could map sewage outflows and algal blooms

Using RC planes or quadcopters to map algal blooms
https://www.youtube.com/watch?v=Hu28ltyBxro 
Its more expensive than the Balloon mapping