His Majesty has made further comments about water supply. First, whereas the household reservoir has a capacity of 19,000 cubic metres, a total water reserve of 10,000 cubic metres is enough to follow the cropping regime throughout the year. Second, the evaporation of the water in the four-metre-deep reservoir is one centimetre per day without rainfall. Thus, if there is no rain for 300 days in a year, which is unlikely in Thailand, there will still be one metre of water left in the pond. Third, since there are numerous large reservoirs distributed throughout the country, they will serve as a back-up system for the small reservoirs, enabling the New Theory to work effectively.