THIS ARTICLE IS A CASE STUDY OF HISTORICAL PROJECTS HYDROSOLUTIONS HAVE WORKED ON.
ENGLISH NATURE
Causes of water recession at Brown Moss Wetland Site of Special Scientifc Interest (SSSI), Shropshire, England
A hydrological & hydrogeological appraisal of the causes of water recession at an ecologically sensitive wetland within Shropshire, England was undertaken, over potential concerns regarding local development impacts.
The Brown Moss ecosystem comprises a localised shallow perched groundwater aquifer, supporting the ephemeral wetland areas, formed within interbedded sand and clay sequenec of glacial origin. Water outflow occurs as leakage through underlying clay into deeper sandy units.
Information regarding local road and infrastructure development was obtained, although none were concluded to have any significant impact on water levels.
Climatic data over the preceding 33 years was used to develop synthetic hydrographs. These indicated that average effective rainfall was insufficient to maintain former water levels within the moss. This may also have been exacerbated by continued dredging activities within the wetlands.
Recommendations were made for ongoing monitoring, further investigation using geophysical techniques and bore construction, to evaluate the use of compensation groundwater from deeper aquifers, including hydrochemical and water balance studies.
Stuart Jeffries
Hydrosolutions Pty Ltd
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