The objective of this review was to source and analyse the evidence on the severity (magnitude) of each of these degradation processes and their spatial extent in Wales.
Nod yr adolygiad hwn oedd i adnabod tarddiad a dadansoddi'r dystiolaeth ar ddifrifoldeb (maint) pob un o'r prosesau diraddiad hyn a'u hyd a'u lled gofodol yng Nghymru.