Summary – July 2016 The rainfall total for England was below average for the first time in nine months at 72% of the July long term average. Soils were wetter than average across much of England. River flows decreased across most of England, but remain normal or higher for the time of year at all but one site. Groundwater levels decreased at most indicator sites but remain normal or higher for the time of year at all but one site. Reservoir stocks mostly decreased, and overall storage for England was 86% of total capacity.
Rainfall Rainfall totals for July ranged from less than 10mm in 8 hydrological areas in south-east and south-west England to more than 130 mm in north-west England. Monthly rainfall totals were above the long term average (LTA) for July in parts of north-west and north-east England, but below average elsewhere. More than half of hydrological areas, particularly in south-east and south-west England, received less than half of the July LTA rainfall. The Isle of Wight, River Frome, West Dorset Streams and Otter Sid Axe and Lim hydrological areas all received less than 20% of the July LTA (Figure 1.1).
For the majority of hydrological areas in England, rainfall totals for July were normal or lower for the time of year. Parts of east and south-east England had exceptionally low July rainfall. It was the second driest July on record (since 1910) across parts of Dorset and Hampshire. Over the three month period to the end of July, rainfall totals were above normal to exceptionally high for many parts of England (Figure 1.2).
At the regional scale July rainfall totals ranged from 38% of the LTA in south-west England to 126% in north-west England. Rainfall totals across England as a whole were below average for the first time in nine months at 72% of the July LTA (Figure 1.3).
Soil moisture deficit Soil Moisture Deficits (SMDs) increased across most of England during July, with the largest increases occurring in east and south-east England. At the end of July SMD values were less than 10mm in parts of Cumbria, Devon and in the headwaters of Welsh catchments that drain to England. Elsewhere, SMDs were mostly between 40 and 110mm, with the driest soils in parts of north-east England (Figure 2.1).
End of month SMDs were smaller than the long term average (LTA) for the end of July across most of England. Parts of east and north-east England however had drier than average soils for the time of year (Figure 2.1).
At a regional scale SMDs increased during July in all areas compared to the previous month. Regional scale SMD values at the end of July ranged from 31mm in north-west England to 81mm in east England (Figure 2.2).
River flows Monthly mean river flows for July decreased at three quarters of indicator sites across England compared with June. Almost all sites were classed as normal or higher for the time of year. Just over half of the sites were above normal or higher for the time of year (Figure 3.1).
Monthly mean river flows were classed as above normal for the time of year at 3 of the regional index sites covering central, east and north-west England. Monthly mean flows were normal for the time of year at the remaining regional index sites in north-east, south-east and south-west England (Figure 3.2).
Groundwater levels Groundwater levels decreased at the majority of indicator sites during July. At the end of the month, groundwater levels were normal at just over half of the indicator sites, and were above normal or higher at all but one of the
2 www.gov.uk/environment -agency © Environment Agency 2016
remaining sites. Groundwater levels at Crossley Hill (Nottinghamshire and Doncaster Permo-Triassic sandstone) remain below normal for the time of year (Figure 4.1).
End of month groundwater levels at the major aquifer index sites were all normal or higher for the time of year. Redlands (Cambridge and Ely Ouse chalk), Jackaments Bottom (Burford Jurassic limestone) and Stonor Park (south-west Chilterns chalk) remain normal for the time of year. Groundwater levels increased very slightly at Heathlanes (Shropshire Sandstone) and remain above normal. Groundwater levels at Skirwith (Carlisle Basin and Eden Valley sandstone), Dalton Holme (Hull & East Riding chalk), Chilgrove (Chichester chalk) and Little Bucket (East Kent Stour chalk) were also above normal for the time of year (Figure 4.2).
Reservoir storage Reservoir stocks decreased at more than two thirds of reported reservoirs and reservoir groups during July. The largest increases in storage were at Grafham Water (4%) and the Elan Valley Group (4%). The largest decrease in storage was at Blagdon Reservoir where stocks reduced by 20%. More than half of reservoirs and reservoir groups are above 85% of full capacity.
End of month stocks were classed as normal or higher for the time of year at four fifths of reservoirs and reservoir groups. Five reservoirs or reservoir groups supplying parts of cen
Summary – July 2016 The rainfall total for England was below average for the first time in nine months at 72% of the July long term average. Soils were wetter than average across much of England. River flows decreased across most of England, but remain normal or higher for the time of year at all but one site. Groundwater levels decreased at most indicator sites but remain normal or higher for the time of year at all but one site. Reservoir stocks mostly decreased, and overall storage for England was 86% of total capacity. Rainfall Rainfall totals for July ranged from less than 10mm in 8 hydrological areas in south-east and south-west England to more than 130 mm in north-west England. Monthly rainfall totals were above the long term average (LTA) for July in parts of north-west and north-east England, but below average elsewhere. More than half of hydrological areas, particularly in south-east and south-west England, received less than half of the July LTA rainfall. The Isle of Wight, River Frome, West Dorset Streams and Otter Sid Axe and Lim hydrological areas all received less than 20% of the July LTA (Figure 1.1). For the majority of hydrological areas in England, rainfall totals for July were normal or lower for the time of year. Parts of east and south-east England had exceptionally low July rainfall. It was the second driest July on record (since 1910) across parts of Dorset and Hampshire. Over the three month period to the end of July, rainfall totals were above normal to exceptionally high for many parts of England (Figure 1.2). At the regional scale July rainfall totals ranged from 38% of the LTA in south-west England to 126% in north-west England. Rainfall totals across England as a whole were below average for the first time in nine months at 72% of the July LTA (Figure 1.3). Soil moisture deficit Soil Moisture Deficits (SMDs) increased across most of England during July, with the largest increases occurring in east and south-east England. At the end of July SMD values were less than 10mm in parts of Cumbria, Devon and in the headwaters of Welsh catchments that drain to England. Elsewhere, SMDs were mostly between 40 and 110mm, with the driest soils in parts of north-east England (Figure 2.1). End of month SMDs were smaller than the long term average (LTA) for the end of July across most of England. Parts of east and north-east England however had drier than average soils for the time of year (Figure 2.1). At a regional scale SMDs increased during July in all areas compared to the previous month. Regional scale SMD values at the end of July ranged from 31mm in north-west England to 81mm in east England (Figure 2.2). River flows Monthly mean river flows for July decreased at three quarters of indicator sites across England compared with June. Almost all sites were classed as normal or higher for the time of year. Just over half of the sites were above normal or higher for the time of year (Figure 3.1). Monthly mean river flows were classed as above normal for the time of year at 3 of the regional index sites covering central, east and north-west England. Monthly mean flows were normal for the time of year at the remaining regional index sites in north-east, south-east and south-west England (Figure 3.2). Groundwater levels Groundwater levels decreased at the majority of indicator sites during July. At the end of the month, groundwater levels were normal at just over half of the indicator sites, and were above normal or higher at all but one of the 2 www.gov.uk/environment -agency © Environment Agency 2016 remaining sites. Groundwater levels at Crossley Hill (Nottinghamshire and Doncaster Permo-Triassic sandstone) remain below normal for the time of year (Figure 4.1). End of month groundwater levels at the major aquifer index sites were all normal or higher for the time of year. Redlands (Cambridge and Ely Ouse chalk), Jackaments Bottom (Burford Jurassic limestone) and Stonor Park (south-west Chilterns chalk) remain normal for the time of year. Groundwater levels increased very slightly at Heathlanes (Shropshire Sandstone) and remain above normal. Groundwater levels at Skirwith (Carlisle Basin and Eden Valley sandstone), Dalton Holme (Hull & East Riding chalk), Chilgrove (Chichester chalk) and Little Bucket (East Kent Stour chalk) were also above normal for the time of year (Figure 4.2). Reservoir storage Reservoir stocks decreased at more than two thirds of reported reservoirs and reservoir groups during July. The largest increases in storage were at Grafham Water (4%) and the Elan Valley Group (4%). The largest decrease in storage was at Blagdon Reservoir where stocks reduced by 20%. More than half of reservoirs and reservoir groups are above 85% of full capacity. End of month stocks were classed as normal or higher for the time of year at four fifths of reservoirs and reservoir groups. Five reservoirs or reservoir groups supplying parts of cen
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