sentences:  However, often the result of these projects is consequently to reduce water flow downstream at some times, and to increase it above the natural flow in some places at other times.Because of the complex hydrology of river systems, it is almost inevitable that some landowners may show, or seek to show, that sporadically, their lands experience flooding that would not otherwise occur in the absence of flood control projects.These allegations have periodically led landowners to claim compensation for changes in the hydrology of river systems having a consequence on their lands.