1. Introduction -- 2. Freshwater wetlands in the UK. The range of wetland types. Sample sites used in this study -- 3. The wetland water balance. Wetland hydrometry. The components of the water balance -- 4. Studying the wetland water balance by lysimetry. Historical background. The IH wetland lysimeter -- 5. Conclusions. Freshwater wetlands in the UK. The wetland water balance. Studying the wetland water balance by lysimetry. Key points
