Definition and Characteristics of Rivers

Surface water includes rivers, where rivers are defined as a system that is complex but not disorderly (complex but not complicated). A complex system is a system that consists of many components, where these components are interconnected and influence each other in a synergistic system, capable of producing efficient work systems and products. Meanwhile, a complicated system is a system whose components do not work synergistically, so that the system produces an inefficient product or output (Maryono, 2008). Complex river components, according to Government Regulation Number 37 of 2012 concerning River Watershed Management (DAS), a river is a natural and/or artificial water channel or container in the form of a water drainage network and the water in it, starting from the upstream to the estuary, with a right-hand boundary. and left by the boundary line. The river basin is a unified ecosystem composed of natural resources and humans as their users (Asdak, 2010). River watersheds are seen as natural resources with a variety of ownership (private, common, state property) and function as producers of goods and services for society, thereby causing interdependence between parties, individuals and groups (Wulandari, 2007).

Complex river components, for example the shape of river channels and branches, river bed formations, river morphology, and river ecosystems. Each of these components is complicated to explain because it is influenced by various factors that carry the nature of the river. Factors carrying the characteristics of the river into a unit called the character of the river (Maryono, 2008).






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