Wrege and Guidon Sorbo Jr. They suggested that the visualization of the organizational tree probably was inspired by the shape of a local flower Salix caprea (goat willow, also known as the pussy willow, or great sallow). Improvement of Channels in Sedimentary Rivers In an 1889 presentation for the American Society of Civil Engineers, Henshaw laid down a theory on the improvement of channels in sedimentary rivers. Henshaw started with a general introduction about the importance of hydrological engineering works, naming Holland as modern example of a "whole country reclaimed from the sea". Waterways beside the railroad tracks elsewhere remain a prosperity of a country. Henshaw stipulates that to secure permanently navigable channel, it is not enough to protect banks or bluffs from erosion, because that "can have no effect beyond preventing a certain amount of sediment being added to that already encumbering the stream; the old varying conditions still exist over the spacious bottom, and in some way these must be altered." In order to do so there are two methods: ...the first method consists in the use of either solid dams or barriers permeable to water extending from the shore to the channel, for the double purpose of directing the latter into its desired course and accumulating sediment at its sides. The result looked for is a contraction of the river bed to the required limits, but [multiple] objections may be urged against this plan... The second method... makes no attempt to accumulate sediment. Its object is to supply artificially to the bottom, on each side of the desired channel, that element of resistance to erosion which is essential to the ideal river ; and it relies upon the action of the inevitable law just mentioned to scour out the channel and continue to do so, to a depth only limited by the slope of the river, or by encountering a stratum that cannot be naturally eroded. By this means it is expected that the ideal river will shape itself under a strictly natural process, for it will be seen that the artificial aid introduced acts solely in supplying a natural deficiency. Henshaws paper further explains the methods and techniques to implement this second method: "Its object is to supply artificially to the bottom, on each side of the desired channel, that element of resistance to erosion which is essential to the ideal river ; and it relies