After artificially modifying a riverchannel, it is necessary to alter the landscape of the riverchannel so that it appears natural. The requirements for achieving this natural appearance are discussed. A variety of photographs of rivers chosen from a number of books were examined to determine the factors that make a landscape appear natural. Some of the photographs were analyzed using computer graphics. The ratio of height (h) of the trees planted along the river embankments to the width (w) of the river is known to be a major contributing factor. A w/h ratio of 3.0 or less was found to make the landscape of the river appear natural. Since the height of the trees planted along the embankment cannot be raised, it is impossible to make the landscape surrounding a wide river appear natural. This problem arises with planned flood discharges from sabo channels which are usually very large. Since the river width cannot be narrowed, it is suggested that these types of rivers be divided into two or more parallel channels.