Discussing demand for reservoirs as water conservation becomes a more critical issue for UK growers, Adlam said it was likely that more and more reservoirs would be built.
He said: "I think nurseries are taking a responsible view of conservation; (they) look at all the options open to them and for some that priority will be to produce reservoirs.
"There probably will be more reservoirs going in over the next few years. There are also changes in water legislation that are driving a move to reservoirs where possible."
Adlam, who acts as a consultant in reservoir constructions, stressed the differences in cost for those with clay and sandy soils.
He said: "There is often the will but sometimes not the means because you basically need an acre (0.4ha) of land to produce 10,000cu m of reservoir and they cost varying amounts depending on suitability of soil."
He added: "I have got three reservoirs in varying stages of construction at the moment and it's basically like that all the time.
"People are becoming much more concerned. The EU water directive is already having an impact in terms of people being concerned about their water supply - it's making everybody think about what they are doing and where their water is coming from in the future."