Approximation to the establishment of a reference network for the establishment of the Water Framework Directive in the Community of Madrid

作者：Bordallo Lopez Alicia; Casado Sancho Carmen

来源：Limnetica, 2012, 31(1): 1-12.

• Reference
• typologies
• biotic indices
• physical-chemical variables

This article presents the results of the search for stations that can constitute a reference network to evaluate the ecological quality of the rivers in the Community of Madrid (Central Spain). Eleven river typologies were defined based primarily on their lithology and morphology. By means of the map of uses and eliminating zones affected by anthropic usage, 16 preliminary reference stations were selected, that were visited to check if they showed local disturbances that could prevent them from being considered reference stations. Seven sites were kept: three of which are of a siliceous mountain river typology and four of which are of a piedmont siliceous river typology. For the rest of the typologies, ecological potentials must be defined or reference points outside the study area must be found. In these stations diverse physical-chemical parameters were measured and the IBMWP, IASPT, QBR, RQI, IHF indices were calculated. %26lt;br%26gt;Only the station located in the Umbria Stream presented the adequate values of all the indices to be considered a reference station. The stations located in the Guadarrama, Navacerrada, Manzanares, Madarquillos Rivers and in the Mediano Stream presented a high concentration of phosphates, due to their natural characteristics, which allows them also to be considered as reference stations, which excludes only the station located in the Perales River. We concluded that it is difficult to create a reference network that allows an ecological evaluation of the rivers in the Community of Madrid because there are few points that meet the characteristics indicated to be considered natural or nearly natural rivers.

• 出版日期2012-6