 the time taken for the solute cloud to completely spread throughout the flume is significantly decreased over the rough bed. It was observed that the bed roughness reduced the average flow velocity up to about 35% and increased the longitudinal dispersion coefficients about 34%. These changes are greater for the experiments with the maximum flow velocity. This shows that the presence of sediment in the river bed can increase the longitudinal dispersion coefficient. Accordingly, with increasing the relative roughness, the values of longitudinal dispersivity increase. The results showed that with increasing the roughness height from zero to 4.24 mm, the longitudinal dispersivities are increased by  Corrected Proof about 108%. Additionally, a relationship was developed using non-dimensional longitudinal dispersion (D L /Vh) as a function of relative roughness (k s /h). The results showed the high ability of this relationship to estimate the longitudinal dispersion coefficient in both smooth and rough beds. It can be concluded that the consideration of bed roughness as the driving force of shear dispersion would improve predictive equations of longitudinal dispersion in the rivers. As the bottom of all natural rivers has roughness elements with different sizes, the results of this study will definitely be useful in estimating the longitudinal dispersion coefficient in natural rivers and quantifying the effect of roughness in the longitudinal dispersion coefficient equations.
One of the limitations of the present study is the impossibility of comparing the results with the findings of other researchers, as this study has been performed in a circular flume. In addition, this study delivered detailed information on dispersion coefficient on a small scale with low width and there a crucial need to study the advection-dispersion process in high-width channels.

DATA AVAILABILITY STATEMENT
All relevant data are included in the paper or its Supplementary Information.It is uncomplicated, free and no registration is needed. There are lots of sites on-line which have the capability to extract audio from YouTube videos. One of the often neglected options of VLC is its skill to transform media files. Not only can it convert just about any audio format, it could possibly additionally extract audio from video files, which could be very helpful for transcription work. In this article, we’ll be speaking about the way to convert WAV files to MP3. Watching videos on the internet is an intriguing factor which makes mover fans glued to their screens. Convert2MP3 lets you convert and download your favorite YouTube videos to MP3 music and MP4 videos. An enormous assortment of various media players can emulate it.
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Help change lives with a cuppa!
A local mum and cancer survivor has supported Cancer Research UK's Coffee Morning campaign by putting the kettle on and inviting friends over for a cuppa and urges others to do the same.
Hastings resident Ann Sandeman was joined by friends Paula Taylor, Amanda Charlesworth and Sarah Luff who are committed to helping the cause that’s so close to her heart. Thanks to research, courage and grim determination Ann is celebrating being a cancer survivor ten years after being diagnosed.
Ann, 46 was first diagnosed with breast cancer ten years ago when she was pregnant. She was doing well after giving birth to a healthy baby, having decided to go ahead with chemotherapy treatment during her pregnancy, but the disease subsequently returned with a vengeance.
In 2010 she faced a further devastating blow when the cancer returned again, this time in her chest cavity and she faced even more gruelling treatment to reduce an inoperable tumour that had wrapped around her heart.
The single mum of three - Hannah, aged 13, Emma, ten, and Ben, nine - has now undergone eight courses of chemotherapy, four courses of radiotherapy and numerous major operations.
Ann’s cancer is incurable but treatable and on-going and new treatments have held the disease at bay. Despite being in almost daily pain and facing an uncertain future, Ann still has an inspirational positive outlook on life. She said: “It’s my children who keep me going. I’m delighted to help launch Cancer Research UK’s Coffee Morning campaign.
“It’s a simple, easy and fun way to raise money for research to help more people, like me, survive cancer.
Lynn Daly, Cancer Research UK spokesperson for East Sussex, says signing up and hosting a coffee morning is a piece of cake. “We all love a good brew and taking time out for elevenses is a great way to catch up with friends and colleagues,” she said.
“I hope people have got a thirst for hosting a coffee morning and help raise money with donations in exchange for a cuppa, snack and chat.
To support Cancer Research UK’s Coffee Morning campaign to help fund life-saving research sign up for a free fundraising pack and host a coffee morning any time until the end of May.
Except thats not the case in real life.
What the government doesnt want doesnt make it that the people dont want it.


Plus, Seraphine specifically sings of both