11. By the 1950s, numerous culverts and extensive channelization existed along the stream. 12. As with channelization , levees are only found in the lower San Juan watershed. 13. Channelization and pollution have taken a hefty toll on its biota and fundamental hydrology.14. Siltation, channelization , and gravel dredging are all threats to bigeye shiner populations. 15. Sometimes they are highly controversial, like channelization of the still-natural Clear Creek. 16. The main limitations of the technology arise from the channelization that the mirrors naturally enforce. 17. This channelization also completely drained off the seasonal Najafgarh Jheel that had formed there previously. 18. The channelization exists for flood control purposes. 19. SAW resonators are used in many of the same applications in which channelization is not required. 20. A groundbreaking ceremony near Tempe Beach Park marked the beginning of construction of the river channelization .
