ABSTRACT
This study is based on the evaluation of the hydrological response of Parambikulam Aliyar basin in Tamil Nadu. Various morphometric parameters are used to evaluate the watershed characteristics responsible for ascribing specific hydrological responses. The study area exhibits a fourth-order drainage basin with the highest stream order length of 304.7 km. The slope 128gradient varies from 0 to 75.67°, and a high degree of slope is noticed in the southern part of the study area. The aspect map of the study area reveals that the Northwest-facing slopes are predominant in the southern part of the PAP basin. Differences in slope and topographic conditions may explain the variance in stream length ratio. The results show that the watersheds of this basin imbibe it with different geoenvironmental characteristics that shall help in landscape management at any spatiotemporal. scale.
