While the theory of first flush is straightforward, first flush may not be observed for one or more of the following reasons: 1  The drainage characteristics of the catchment may prevent it. 2  The pollutants may not be very mobile. 3  Pollutant sources that are effectively continuous may exist within the catchment.
Jenna Dewan Tatum to Host and Mentor for Jennifer Lopez's NBC Show World of Dance. Looks like Jenna Dewan Tatum has nabbed a new gig for the new year â sheâll serve as the host of Jennifer Lopezâs NBC show World of Dance. The 36-year-old actress and dancer joins judges Derek Hough, NE-YO and Lopez on the 10-episode series, which features dancers competing for a $1 million grand prize, according to Deadline Hollywood.
The USA show has had only Pat Sajak as host for the syndicated nighttime version. Both Pat Sajak and Chuck Woolery hosted the earlier Daytime USA show. Alex Trebek did guest h â¦ ost the nighttime show on 1 April 1997 when he and Pat Sajak traded places for Hosts of the Wheel of Fortune and Jeopardy shows.