Uploaded on 2015-12-09 by LorenaCM2015

Springs (8.4%), aquifers (49.3%), Cutzamala dam system (28.3) and Lerma dam System. Lerma and Cutzamala regions are extremely important for the city. http://www.conagua.gob.mx/CONAGUA07/Noticias/WB_Cutzamala_LowRes.pdf ![enter image description here][1] The cutzamala system is located 127 km away from Mexico City. http://refutacionesyartificios.blogspot.ca/2011/03/el-sistema-cutzamala-en-dibujitos.html ![enter image description here][2] **Regulating Services: Urban Canyons** 50% of the water consumed in Mexico city comes from an underground aquifer. Canyons and soil conservation are crucial for hydraulic balance of the city. Most of the groundwater recharge is obtained by infiltration of rainwater in the Soil Conservation and the urban canyons. There are approximately 87,000 hectares of urban canyons and conservation soil protected by Mexico city government, which is very difficult due to the high urbanization level. http://www.diversidadambiental.org/medios/nota237.html ![enter image description here][3] Infiltration capacity of these areas is particularly important because its substrate is of volcanic origin and consists of porous and fractured rocks when there is adequate vegetation cover they perform as sponge retaining and infiltrating a lot of rain water. This image from google maps shows a urban canyon in the middle of a business district ![enter image description here][4] http://www.inecc.gob.mx/descargas/dgipea/pon_barranca_poniente_cd_mex.pdf **Habitat supporting services. Forest and lakes.** Mexico city surface is distributed as follows: 40% of its territory is mostly urban use and 33% of temperate forests (pine, fir, pine-oak and oak), pastures and thickets. 27% of its territory is for agricultural use. The protected territory is home to 4,500 species of flora, fauna and microorganisms, including 355 species of birds and 65 three thousand insects. One of the most important is the Xochimilco Region. Xochimilco is a place where many wild birds still have environmental conditions for feeding, breeding, rest and refuge. http://www.mexicodesconocido.com.mx/aves-entre-canales-una-exhibicion-de-gala-en-xochimilco.html ![enter image description here][5] ![enter image description here][6] ![enter image description here][7] **Cultural services: Urban forest.** Chapultepec is an urban forest (673 hectares) that holds museums, restaurants, sport infrastructure, zoo, and playgrounds. Is the most important reunion places for Mexico city citizens. http://www.chapultepec.org.mx/galeria/ ![enter image description here][8] ![enter image description here][9] [1]: https://edxuploads.s3.amazonaws.com/14496641449293715.jpg [2]: https://edxuploads.s3.amazonaws.com/14496642056082169.jpg [3]: https://edxuploads.s3.amazonaws.com/14496746937799644.jpg [4]: https://edxuploads.s3.amazonaws.com/14496748295415285.jpg [5]: https://edxuploads.s3.amazonaws.com/14496797847650759.jpg [6]: https://edxuploads.s3.amazonaws.com/1449679822765181.jpg [7]: https://edxuploads.s3.amazonaws.com/14496799185951733.jpg [8]: https://edxuploads.s3.amazonaws.com/14496806829135065.jpg [9]: https://edxuploads.s3.amazonaws.com/14496807181365939.jpg