A target water quality for fish and other aquatic fauna of a liming project is discussed in Chapter 3. In brief, the pH and calcium concentration need to be raised and the toxic inorganic fraction of total aluminium reduced. As mentioned in Chapter 3, the specific target water quality of a liming project will be dependent on a number of factors. At Loch Fleet. since the objective was to improve the water quality so that brown trout survival and reproduction was possible, the target water quality was set at pH greater than 6, calcium concentration greater than 100 µeg litre 1, and monomeric inorganic labile aluminium less than 30 µg litre 1. A regular programme of sampling of surface waters started early in the project to assess the extent to which the water quality would need to be improved and, since liming, to establish the water quality changes that followed. Water quality data for pH calcium, and aluminium are obviously crucial to judging the success of an acid mitigation project. Sampling and analysis of surface waters, of course, can extend further, and in many instances a more comprehensive programme is implemented to accompany a programme of analysis for deposition inputs (see Chapter 5). This allows hydrochemical input/output budgets or flux calculations to be made. These can often help to understand acidification processes in a catchment and provide a way of predicting the duration of treatment effectiveness (see Chapter 16).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Water Quality of Surface Waters Before and After Liming
T. R. K. Dalziel
M. V. Proctor
- Springer Netherlands
- Chapter 12