Analisis Dayadukung Lingkungan dan Optimalisasi Pemanfaatan Wilayah Pesisir untuk Pertambakan di Kabupaten Gresik

Abstract

This research is carried out to analysis the environmental carrying capacity and develops model for optimalization of the coastal zone for brackish water fishponds. The research has been conducted in Gresik, East Java by using the survey method and collecting secondary data from the other researches and related institutions. In this research, three approaches used for analyzing the environmental carrying capacity of the brackish water fishponds, ie.: regression analysis, quantitative method for availability water inwaters and weightedmethods from land suitability class. Furthermore, it is used the linear goalprogramming (LGP) for optimalization modeling of spatial utilization.The result shows that utilization of the coastal zone for the brackishwater fishponds hasbeen over to its environmental carrying capacity. This phenomena seems from the maximal production of brackishwater ponds 12,134.4 tons at land areas of 10,943.5 hectares which was happened in 1999. By using the first approach (regression analysis), the limiting land areas used to declare as an environmental carrying capacity is estimated around 9,378.89 ha. The second approach using water quantity method also shows that the land areas fortraditional, semi-intensive and intensive cultures as follow 9,413.49ha, 1,647.36 ha and 941.35 ha. The last approach yieldsthe land areas which can be used for milkfish (Chanos chanos) culture is 9,882.89 ha and this for shrimp culture is 9,457.28 ha. These areas are used as limiting factors for optimalization of the coastal zone for brackish water fishponds. Based on the concept of sustainable development, such as; production,work force, and carrying capacity, the LGP optimalization model results optimal land areas for shrimp and milkfish traditional cultures as follows 415.56 ha and 8,963.33 ha. The optimal land area for mangrove is 2295,85 ha.