River areas are dubbed as productive and activity-dense areas because they have diverse, potential and economic value. It is said to be a productive and dense area of activity because in this region a variety of industrial and human activities are developing rapidly such as: fisheries,
tourism, transportation, agriculture, mining and others. Commodities are increasing and varying along with the increasing human and industrial needs so that increasing pressure on the preservation of ecosystems and resources. The concern is the tendency of damage to river resources is caused more by exploitation practices that are not environmentally friendly, such as the use of heavy equipment exploration, fishing gear forbidden fisheries and excessive
agricultural processing. In addition to the potential of fishery resources, there is also a marine tourism area based on agricultural and fisheries culinary which is growing very rapidly.
The river tourism area is growing along with the support of basic and supporting facilities and infrastructures as well as human and industrial activities in the agriculture and fisheries sector, transportation, and other sectors that support each other and human needs for recreational
Various types of resources in the river area have superior commodity specifications and mainstay, including agriculture (food, horties, forestry, livestock, fisheries, plantations) in the watershed must be efficient so it is necessary to determine the leading commodities in the watershed. Economic activity is divided into bases (bringing money from outside the region) and Non-bases (meeting local needs).
Like Sub Watershed Sub in Central Java Province, Indonesia. At least every village has 4 commodities, and 16 superior commodities are the maximum. As many as 30.4% of villages have 1 to 5 mainstay commodities, 63.3% have 6 to 10 mainstay commodities and 6.3% have more than 10 leading commodities.
The more commodities that are included in the base category means the more commodities that have a comparative advantage to be developed in a village. Village information that has advantages over a commodity needs to be known because it reflects the zoning of commodities. There are commodities that only exist in an area specifically and many commodities are scattered in all regions. Villages that have many superior commodities will be suppliers to non-base regions and villages with many superior commodities will be more advanced compared to regions that have few superior commodities.