So just to review a little bit�
Our best estimate of the total phosphorus entering China Lake from sediments and external sources is 4,843 kg/yr, resulting in a concentration of 18.8 ppb.
Remember that the threshold for algal blooms is about 15 ppb.
In order to reduce the concentration to this amount, the total phosphorus loading needs to be reduced to 3,850 kg/yr -- a reduction of about 1000 kg/yr, which is a lot!
So, how can this be achieved?