For this sampling programme, a basic suite of determinands are analysed for each sample taken at the listed sites. These are as follows:
Suspended solids
Biochemical Oxygen Demand (ATU)
Dissolved Oxygen
Temperature
pH
Alkalinity
Total Hardness
Conductivity
Ammoniacal Nitrogen
Nitrite Nitrogen
Nitrate Nitrogen
Phosphate Phosphorus
Chloride
RIVER LEVEN CATCHMENT NATIONAL GRID SAMPLING REFERENCE FREQUENCY PER YEAR
Loch Lomond
Ardlui NN 323154 4
Inveruglas NN 324090 4
Inversnaid NN 336088 4
Tarbet NN 324044 4
Firkin Point NN 340012 4
Rowardennan 356982 4
Inverbeg 351977 4
Ross Point 358955 4
Anchorage 384948 4
Luss 364930 8
Inchcruin 379915 8
Balmaha 416907 8
Endrick 422899 8
Creinch 389892 8
Ross Priory 407875 8
Ross Priory (deep) 407875 8
Midross 365860 8
Auchendennan 373837 8
Duck Bay 377834 8
Duck Bay 377834 8
Duck Bay 377834 8
Balloch Castle 385835 8
River Leven 383826 8
River Leven
Balloch Bridge 392819 4
Bonhill Bridge 395798
Renton Foot Bridge 391786 12
Downstream Dalmoak 390763 4
Dumbarton 391755
Endrick Water
Todholes 673859 6
Fintry Bridge 615868
Ballochearn Bridge 579884
Balfron 541881
Dalnair Ford Bridge 504859
Surveys of Freshwater Lochs
Eutrophication Studies
In view of the increasing concern about the effects of eutrophication and acidification on freshwater lochs, a long-term monitoring programme has been set up for the four largest lochs in the former CRPB's area (Lomond, Awe, Doon and Eck), which are important for conservation, recreation or water supply. Loch Lomond is sampled every year, but the other lochs are to be monitored every three years. Loch Lomond is to be sampled in 1996/7.
Chemical samples are taken 12 times a year in Loch Lomond at seven sampling stations situated along the centre line of the loch. Loch Eck and Loch Doon are sampled twice a year at three sites. Integrated samples of water are collected to a depth of 5 m and analysed for the following
Chlorophyll-a
Silica
Total phosphorus
Orthophosphate
Total dissolved phosphorus
Ammoniacal nitrogen
Nitrite nitrogen
Nitrate nitrogen
Secchi depth transparency
Additional determinands will be measured on samples from Loch Lomond Environmental Change Network sites.
Two types of biological sample are taken:
Integrated water samples to a depth of 5m for phytoplankton counts taken at the same frequency as the chemical samples at two Environmental Change Network sites in Loch Lomond and at one site in Lochs Eck and Doon.
Ten replicate grabs for examination of benthic invertebrates taken annually from the two Loch Lomond Environmental Change Network sties and one every three years from one site in Lochs Eck and Doon.
LOCH SITE NATIONAL GRID REFERENCE
Lomond Inveruglas Isle (a) NN 328096
Cailness NN 335062
Stuckgowan (b) NN 332030
Firkin NN 344010
Ross Point NS 359956
Inchcruin NS 380915
Creinch NS 390890
Ross Priory Water Intake NS 407976
Auchendennan NS 379837
(a) and (b) additional sites for TP only