Before revision: The gradient of a river (I) can be determined by Chézy _formula : in which = the coefficiënt of Chézy (m½/s); This is often in the order 50 (m½/s).
After revision: The gradient of a river (I) can be determined by Chézy formula : in which = the coefficiënt of Chézy (m½/s); This is often in the order 50 (m½/s).