Northern water snake The belly also varies in color. It can be white, yellow, or gray. Usually it also has reddish or black crescents. The northern water snake is nonvenomous and harmless to humans, but superficially resembles the venomous cottonmouth and is often killed unnecessarily as a result of this mistaken identity. The two can be easily distinguished by morphological traits: the water snake has a longer, more slender body and a flattened head the same width as the neck, round pupils, and no heat-sensing pits. The cottonmouth has a fatter body, a wedge-shaped head with prominent venom glands that are wider than
Water management in the Metropolitan Region of São Paulo expanding water supply exacerbates the exploitation of groundwater resources. There is a high threat of groundwater contamination, especially in the Eastern part of the Alto Tietê. Water demand. Water demand in the Alto Tietê in 2004 was as follows: In the Alto Tietê there is growing conflict between drinking water supply and irrigation. Only one sub-basin of the Alto Tietê can expand its potable water supply from the current supply of 10 m³/s up to 15 m³/s. In other water basins serving the MRSP this is not the case. For example, in the Guarapiranga and Billings basin there is also