Model Instance Title:
North Oxfordshire Recharge Model
Model Instance Short Name:
North Oxfordshire Recharge
Description:
A method to improve the calculation of overland flow in distributed groundwater recharge models is presented and applied to two sub-catchments in the Thames Basin, UK. Recharge calculation studies tend to simulate the runoff flow component of river flow in a simplistic way, often as a fraction of rainfall over a particular period. The method outlined in this study intends to improve the calculation of groundwater recharge estimates in distributed recharge models but does not present an alternative to complex overland flow simulators. This method uses seasonally varying coefficients to calculate runoff for specified hydrogeological classes or runoff zones, which are used to model base flow index (BFI) variations across the basin. It employs a transfer function model to represent catchment storage. Monte Carlo simulation was applied to refine the runoff values. Decoupling the runoff zones between the two sub-catchments produces a better match between the simulated and observed values; however, the difference between observed runoff and the simulated output indicates other factors, such as landuse and topographical characteristics that affect the generation of runoff flow need to be taken into account when classifying runoff zones
Creation/Publication Date:
2011
Disciplines:
GROUNDWATER SCIENCE
Contact Details:
| Name | Organisation | Country | Email |
|
Andrew Hughes
|
British Geological Survey
|
UK
|
aghug@bgs.ac.uk
|
Time Interval Covered:
from:
01-Jan-1970
to:
31-Dec-2008
Spatial Extent:
Bounding Box (Lat/Long WGS84):
West:
-1.784
East:
-1.05
South:
51.833
North:
52.234
Scope of Vertical Extent:
Superficial
Vertical Extent (metres above OD) Maximum:
240
Minimum:
65
Spatial Reference Systems of Datasets:
Horizontal Reference System:
WGS 84
Vertical Datum:
mean sea level height
Vertical Units:
metre
Grid Resolution:
| Spacing X | Spacing Y | Spacing Z | Cells X | Cells Y | Cells Z |
|
1000
|
1000
|
|
50
|
45
|
|
Time step interval:
day
Time step value:
1
Additional information (science questions addressed, assumptions etc.):
|
Science Question
|
Can runoff be better represented by including catchment storage in the calculation method?
|
Data:
| Input Dataset Name | Version | URL Link | Parameter | Value | Units |
|
Rainfall – daily gridded CEH
|
|
|
| | |
|
MORECS PE
|
|
|
| | |
|
Landuse LCM2000
|
|
|
| | |
|
CEH DEM
|
|
|
| | |
|
Other input parameters
|
|
|
| | |
| Output Dataset Name | Version | URL Link | Parameter | Value | Units |
|
Output Data
|
|
|
| | |
| | | |
Long term average rainfall
|
|
|
| | | |
River Flow
|
|
|
Documents and Published Papers available for this model instance: