Hi All,
I joined the forum becuase there seems to be some knowledgeable people on here who might be able to help me solve a problem. I have just excavated a 5 acre lake near a limestone karst.
We have an abundance of freshwater supplys but unfortunately at the top end of our excavation we have opened up a brackish water spring which appears to be as a result of karst spring conduit which will go all the way to the sea some 5kms away.
the sites 400 meters long and the groundwater is fresh from not far beyond where this brackish spring has been exposed. The spring is clearly source by the mountain which has a cave below ground and sea level....we are only a few meters above sea level and the spring appears to be running underground at about 2.5 to 3 mtrs.
My thinking was if I dug a 5 meter deep trench between the spring and lake bed, all the brackish water would gather in the trench and not reach the lake bed, trouble is I cant leave the trench exposed it has to be filled. what would happen if I place a PVC liner on the lake side edge of the trench and filled the trench with stones? and then a pipe (french drain) just below existing ground water level (the same as ground level give or take an inch)....would all the brackish water be forced up into the pipe where I could steer it away from the fresh lake?
Thanks in advance!
