The document discusses the establishment of effective collaboration networks in agriculture, hydrology, and soils. Key points include the accuracy of evaporation and transpiration predictions, the relationship between soil moisture deficit and runoff, and the timing of nitrate and pesticide pollution in rivers. Additionally, it emphasizes the importance of accessible and usable data for informed discussions and decisions.

1. Building Bridges – establishing
effective collaboration networks
Bob Evans
Visiting Fellow
Global Sustainability Institute
Anglia Ruskin University
Cambridge

2. Building Bridges
Other side bridge – who?
Agriculture, soils, hydrology
Do they want to talk?
Dialogue
Common ground

3. Some thoughts
Three points:
• Glad we didn’t get it wrong
• What happens to the rain?
• Access to data

4. Glad we didn’t get it wrong
PSMD + AWC
Anon
Anon
CUCAP

5. Glad we didn’t get it wrong - BUT
• Do evaporation and transpiration occur
at predicted rates (e.g. Maff Tech Bull 1967)
or do constraints kick in(e.g. MORECS)?

6. What happens to the rain?
• Can Potential Soil Moisture Deficit explain:
– When Runoff occurs
– When Drains flow
– Stream flow
Copyright Evans 2013
Copyright Evans 2013

7. What happens to the rain?
• When do nitrate and pesticides reach rivers?
Wissey stream flow to PSMD
2003-2008 r = c. - 0.7 (range - 0.5 to -0.9)
Metaldehyde in rivers
Max value
2.4 ug/l
Data supplied by Environment Agency
Anglian water

8. Access to Data
• NEED to mine the data
• FREE access to Data
• EASY access to Data
• Easily useable
Thank you