i searched the internet but all i get is pictures and useless information about rivers in america
211214
Topography is the word you want. Combine Topography with river and throw it into a search engine and things like this Wikipedia article should fall out.  Happy hunting.
119535
I suppose you could research the history of each state - some borders are obvious (rivers), while others are lines of latitude and longitude. Once you get past that, there probably aren't many other reasons.
167595
Just do a web search on it lazy.
190307
http://usa.usembassy.de/travel-states.htm
255013
go to google and type in bhara river basin and it will give you a choice of sites on that subject.hope this helps!
244582
just search on google.
49333
http://www.lcbp.org/ATLAS/HTML/so_historic.htm\n\nThis is a pretty good US map.
55684
I dont know that much about that but its pretty easy to find if you use search. Here is what I came up with for you.\nhttp://www.eenorthcarolina.org/public/ecoaddress/riverbasins/RoanokeRiverBasin.htm
104642
Well I was there, if you are indeed talking about Missouri/Illinois etc....  I am sure there is a lot of information out there.  Just google or ask.com info about the flood of 93...
98444
check out www.darterpress.com
504290
Go to http://www.dumbasswasteoftime.com
169292
http://en.wikipedia.org/wiki/Jordan_River
506392
I searched the Google but sorry to say, didn't get much beneficial results!!!
307372
Try the library. I checked out a book on 'Michigan canoeing' and it had a ton of maps and useful information. The guys that wrote the book actually canoed all the rivers. They also have the class types on them. You might want to see if there are any books like that for north Carolina. Good luck and i hope you have a blast!
162266
http://www.mbr-pwrc.usgs.gov/bbs/anim/h3520.html
112521
go to the national geographic website they will tell you EVERYTHING you need to know
136092
you shud search google for this purpose