Cost Effeectiveness Of Land Management Measures

Question 0

What are the 6 main steps in CEA?

Answer 0

1. Define objective
2. Identify measures to achieve it
3. Identify eff. Of measures
4. Cost of measure
5. Combine measures to address gap
6. Compare cost- eff combos

Question 1

What is CEA?

Answer 1

Cost effective analysis takes a particular (WFD) objective as given and identifies cheapest means to achieve it

Question 2

Give 3 examples of mitigation methods from the DEFRA inventory (83 overall measures)

Answer 2

Cover crops
Tillage
Cover manure
Increase size of slurry container

Question 3

How effective is cover crop at reducing N and P?

Answer 3

V effective at reducing nitrate NO3 and particulate P
Need to establish cc right after harvest
Or can undersow spring crops with cc
Cc is only effective if takes up N before winter drainage - leads to leaching
For part P crop doesn’t need to be alive

Eff: 30-60% NO3 reductions
20–80% P and Sediment

Question 4

Wensum DTC and Salle c.s.

Answer 4

1993 - 71km designated SSSI
2001- SAC as 99.4% of the river habitat in unfavourable and declining g condition
Heavily exploited land e.g. Field drains, widening and straightening of channels

Mitigation methods at Salle:
2013-2014 cover crop (oilseed radish) and strip tillage using spring beans
Cover crops at Salle cost £15,000 varies due to location and condition