¥Best estimate from external sources and sediments:
–W = 4843 kg/yr
–P = 18.8 ppb
¥Threshold for algal blooms = 15 ppb
¥To lower phosphorus concentrations to 15ppb, W needs to be reduced to 3850 kg/yr
¥How?
So just to review a little
bitÉ
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!