I ask because it's a high alpine lake surrounded by mountains. It has no significant water outflow. I'm not sure there's a path for water from the lake's waters

I ask because it's a high alpine lake surrounded by mountains. It has no significant water outflow. I'm not sure there's a path for water from the lake's watershed into agricultural land. Water is lost from the lake to evaporation in enormous amounts and to local uses in much smaller but probably still significant amounts, and that might be about it.