Shrivenham Corallian Operational Catchment
About
The Shrivenham Corallian Groundwater Body (GWB) describes part of the Corallian strata between the River Thames to the north and the River Ock to the south. The Shrivenham Corallian GWB is located to the north of the London Basin syncline. Springs emerge from the Shrivenham Corallian GWB to fail mainly southwards into the River Ock however some springs emerge to the north of the GWB to flow into the River Thames. The Shrivenham Corallian is a Secondary A Aquifer with water-bearing permeable strata that provide a moderate level of storage. Generally they consist of interbedded sands and limestones. The majority of the unit lies between the Oxford Clay to the north and the Kimmeridge Clay to the south which are unproductive strata. In a few places they lie adjacent to Lower Greensand exposures. A number of springs in the Marcham area which flow into the River Ock are saline in nature.
Classifications data for Shrivenham Corallian Operational Catchment
Number of water bodies
The number of water bodies in the river basin district. It shows whether these are natural, artificial (such as canals and reservoirs) or have been modified ('heavily modified') for particular uses.
| Water body categories | Natural | Artificial | Heavily modified | Total |
|---|---|---|---|---|
| River, canals and surface water transfers | 0 | 0 | 0 | 0 |
| Lake | 0 | 0 | 0 | 0 |
| Coastal | 0 | 0 | 0 | 0 |
| Estuarine | 0 | 0 | 0 | 0 |
| Groundwater | 1 | 0 | 0 | 1 |
| Total | 1 | 0 | 0 | 1 |
Ecological status for surface waters
Table summarises the current ecological status of surface water bodies. Water bodies are classified as being at high, good, moderate, poor or bad ecological status or potential.
| Ecological status or potential | Bad | Poor | Moderate | Good | High | Total |
|---|---|---|---|---|---|---|
| Number of water bodies | 0 | 0 | 0 | 0 | 0 | 0 |
| Number of water body elements | 0 | 0 | 0 | 0 | 0 | 0 |
Chemical status for surface waters
Table summarises the current chemical status of water bodies. These are classified as being at good or fail.
| Chemical status | Fail | Good | Total |
|---|---|---|---|
| Number of water bodies | 0 | 0 | 0 |
| Number of water body elements | 0 | 0 | 0 |
Quantitative status for groundwater
Table summarises the quantitative status of groundwater water bodies. These are classified as being at good or poor.
| Quantitative status | Poor | Good | Total |
|---|---|---|---|
| Number of water bodies | 0 | 1 | 1 |
| Number of water body elements | 0 | 4 | 4 |
Chemical status for groundwater
Table summarises the chemical status of groundwater water bodies. These are classified as being at good or poor.
| Chemical status | Poor | Good | Total |
|---|---|---|---|
| Number of water bodies | 0 | 1 | 1 |
| Number of water body elements | 0 | 5 | 5 |
Challenges data for Shrivenham Corallian Operational Catchment
Reasons for not achieving good status by business sector
The issues preventing waters reaching good status and the sectors identified as contributing to them. The numbers in the table are individual counts of the reasons for not achieving good status with a confidence status of 'confirmed' and 'probable', where the latest classification is less than good status. There may be more than one reason in a single water body. Note, table does not include reasons for deterioration.
| Significant water management issue | Changes to the natural flow and level of water | Invasive non-native species | Physical modifications | Pollution from abandoned mines | Pollution from rural areas | Pollution from towns, cities and transport | Pollution from waste water |
|---|---|---|---|---|---|---|---|
| Agriculture and rural land management | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Domestic general public | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Industry | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Local & central government | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mining and quarrying | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Navigation | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| No sector responsible | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Other | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Recreation | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sector under investigation | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Urban and transport | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Waste treatment and disposal | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Water Industry | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Objectives data for Shrivenham Corallian Operational Catchment
Ecological status or potential objectives for surface water bodies
Table summarises the ecological status and ecological potential objectives set for water bodies in the river basin management plan. Each water body is only counted once in this table. Each water body objective consists of a target status and a date when it was, or is expected to be, met.
| Status | Bad | Poor | Moderate | Good | High | Total |
|---|---|---|---|---|---|---|
| Total | 0 | 0 | 0 | 0 | 0 | 0 |
Chemical status objectives for surface water bodies
Including those with less stringent objectives and extended deadlines
| Status | Fail | Good | Total |
|---|---|---|---|
| Total | 0 | 0 | 0 |
Quantitative status objectives for groundwater
Including those with less stringent objectives and extended deadlines
| Status | Poor | Good | Total |
|---|---|---|---|
| By 2015 | 0 | 1 | 1 |
| Total | 0 | 1 | 1 |
Chemical status objectives for groundwater
Including those with less stringent objectives and extended deadlines
| Status | Poor | Good | Total |
|---|---|---|---|
| By 2015 | 0 | 1 | 1 |
| Total | 0 | 1 | 1 |