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jrc · 04-15-2006, 10:54 AM

I found some online data. If you look the link, scroll down to Lake Winnipesaukee, there are several measured sites. Look for the column labled Sechhi. It give the depth in meters that the Sechhi disk is visible. This a direct measure of water clarity. You will see that from 1979 to 2001 many readings improved. There are a couple of spots that stayed the same, but not one spot is worse than 1979.

http://www.des.state.nh.us/wmb/lakes...mmary_2005.pdf

This show how to read the chart:

http://www.des.state.nh.us/wmb/lakes...mans_guide.pdf

One thing to consider is that water clarity is just one measure of water quality. If we get the zebra mussels many fear, we may have water that is too clear to support other animals.

04-15-2006, 10:54 AM	#19
jrc Senior Member Join Date: Apr 2004 Location: NH Posts: 2,689 Thanks: 33 Thanked 439 Times in 249 Posts	No supported by facts I found some online data. If you look the link, scroll down to Lake Winnipesaukee, there are several measured sites. Look for the column labled Sechhi. It give the depth in meters that the Sechhi disk is visible. This a direct measure of water clarity. You will see that from 1979 to 2001 many readings improved. There are a couple of spots that stayed the same, but not one spot is worse than 1979. http://www.des.state.nh.us/wmb/lakes...mmary_2005.pdf This show how to read the chart: http://www.des.state.nh.us/wmb/lakes...mans_guide.pdf One thing to consider is that water clarity is just one measure of water quality. If we get the zebra mussels many fear, we may have water that is too clear to support other animals.