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ou2u72. Captions for Photographs Photograph 1. Channelization of the Tijuana River.. Concrete channelization, urbanization, and industrialization near the river dt:stroy riparian vegetation, thus resulting in reduction of groundwater recharge and degradation of water quality. Photograph 2. Zone 1, riparian vegetation in Rio Alamar. Note the lack of vegetation in the in the channelized section of the river. Photograph 3. BorderLink students conducting riparian vegetation survey under the supervision of Jose Delgadillo. Photograph 4. Groundwater use in the Alamar River Corridor. Farmer stated that this water is potable (Zone 2). Photograph 5. Residents in Zone 1 must buy water from pipas (water trucks) because they do not have access to groundwater resources in the Alamar River Corridor. Lack of sewage infrastructure poses a contamination risk to groundwater resources. Photograph 6. Cattle grazing in Zone 3. Note soil erosion due to hoof imprint from cattle. Photograph 7. The future of the Alamar River, concrete channelization? Photograph 8. Alternative to concrete channelization, urban river park San Luis Obispo, California. Photograph 9. Urban river park San Luis Obispo, California, Note walls channelize certain sections of the river, but the riverbed remains uncovered (see photograph 8). Photograph 10. Housing and hotel development South Platte River, Denver, Colorado. Note riparian vegetation restoration near the river. Photograph 11. Commercial development within river park, Denver, Colorado. Photographs 12 and 13. Confluence Park, Denver Colorado. In areas prone to flooding a levy or wall may be necessary; however, the riverbed remains uncovered. Note the green areas, the recreational activities, and that the bottom of the river is uncovered. Back photographs. BorderLink 2000 student researchers. 19