We tested 35 variables describing the hydrographical network surrounding the colonies from a local to a regional scale using a Geographic Information System.
The results show that, whatever the scale, the distribution of the breeding colonies was not governed by the same elements of the hydrographical network in the different areas.
A technique is presented for a joint interpolation of water balance components that considers estimated or observed values with their a priori uncertainty and yields balanced interpolated values, which respect the water conservation at all levels within the hydrographical network.
For example, Noutchogwe (2010) presented a close correlation between the lineaments inferred from magnetic anomalies, the sites of thermo-mineral springs and the hydrographical network in Adamawa Cameroon.
The Philippines likewise claims historical ties to the territory, the earliest being the Carta Hydrographical y Chorographics De Las Yslas Filipinas (or "Hydrographic and Chorographic Map of the Philippine Islands").
Moreover, important hydrographical and geological aspects like rivers, water channels and connection of Dhaka with the regional water network have been described in his book which helped to recreate the past landscape of Dhaka.
The British navy appointed its first hydrographer in 1795, and the United States established a naval observatory and hydrographical office in 1854.
His work The World's Hydrographical Description (1595) deals with the Northwest Passage.
Macrozoobenthic species composition and biomass significantly correlated with time after cessation of sand extraction, sediment and hydrographical characteristics.
