The Erren River was the one of the earliest migration’s place for the Han people that settled in Kaohsiung area. Although being an initial development area, in reality this initiative did not create a positive momentum for local further development both on upstream and downstream of the Erren River. The Erren River area has widespread layer of blue-gray mudstone which is the natural soil composition around that area. From the agriculture point of view of poor fertility, the soil has a low environmental capacity. Consequently soil composition has been identified as the main reason for the slow the development of the area. At the same time due to unstable river bank caused by the soft rock and strong river erosion there are frequent collapses of the bank changing the course of the river resulting in the transitory nature of the village establishment. With the changes to the profile, course and flood potential of the river this has a direct impact upon travel pathways such as transport routes and the instability of walking paths due to river embankment being collapse. All these events have negative influence upon the development of surrounding villages. A further variable of the river as it rushes between upstream and downstream is the role of siltation which results in random permutations of river bank collapse outcomes, with again a disparate set of consequence laid upon the settlements. Upstream of the Erren River is an outcome of the collapsed of river embankments, rerouting of the river itself, siltation of the river profile changes and river cliff retreat. Some villages may disappear through flood or become navigationally isolated which require redevelopment or relocation. Downstream the Erren river’s has experienced course change and has become extended that is longer in length which results in again an unstability of the river. Some of the villages located around lagoon with its development affected by the lagoon sediment. For these villages, the impact form the Erren River is indirect and not a direct safety threat.