Spatial multi-criteria site selection of retention pond using ordered weighted averaging combination.

The spatial location of a retention pond is critical to its performance and its incorrect placement can derail its function. The choice of spatial location usually uses a popular combination method, namely WLC (Weighted Linear Combination) which has only a single decision strategy. This study aims to select the spatial location using a relatively new method of OWA (Ordered Weighted Averaging), which has multiple decision strategies. The evaluation criteria are determined based on literature studies and the criteria weights calculated using the AHP method with the involvement of ten experts from various related agencies. The method of sensitivity analysis has been carried out to test the reliability of the model built. The established OWA site selection model results five location suitability maps based on the five representative decision strategies, one of which was selected to be proposed. The proposed map has four levels of suitability, i.e., low, medium, high, and very high with an area of 3274.86 ha (20.20%), 3032.44 ha (18.71%), 7756.74 ha (47.85%), and 2145.59 ha (13.24%) successively. Using the proposed site suitability map, a potential site map was derived showing 63 locations that meet the minimum area requirements. [ABSTRACT FROM AUTHOR]