Tender: Hydrological Monitoring Network Design for Lower Derwent Valley National Nature Reserve

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Natural England is seeking a supplier to produce a conceptual hydrological model for the Lower Derwent Valley National Nature Reserve in the East Riding of Yorkshire and to advise on suitable locations for a network of dip wells relative to the site’s permanent vegetation and soil plots. The work may be carried out as a desk-based exercise using existing information or include a site visit if appropriate, and is part of Natural England’s Long Term Monitoring Network (LTMN), which has collected ecosystem data since 2010 across 37 sites (most of which are National Nature Reserves) with approximately 50 permanent vegetation plots and five permanent soil plots at each site; hydrological change is regarded as a potentially significant but currently poorly understood driver of ecosystem change on water-dependent LTMN sites.