the different depths of the roots of various trees also play in important role in this process.in terms of watershed management rubber plantations are widely accepted as being quite effective at replacing areas of forest.however,this is only recommended to replace heavily degraded forest and certainly not to replace pristine or near pristine forests.if we choose to replace our dense forests with monoculture crops like rubber much of the natural eco-system services are lost or dramatically reduced.water runs off the almost bare soil much faster and the roots are also a uniform depth reducing the potential for rainfall to penetrate the rock.water is our most important resource and our watersheds must be managed very carefully to ensure sustainable supplies.if not we risk impacting groundwater levels as we lose the natural sponge effect of the forests,which could severely impact water security.cambodia has already experienced some problems with water security,particularly groundwater,but this is not always due to deforestation.