Introduction
摘要
This chapter introduces the study’s context and objectives. It defines runoff dynamics and highlights that monsoon-driven river basinsRiver basin like the South Koel are influenced by climate variability and human interferences—the two primary drivers of hydrological change. The chapter frames key research questions on how climate and human interferences alter basin runoff and affect downstream delta systems. It outlines the study’s scope, objectives, and methods (trend analysis, modeling, etc.) and previews the book’s structure. By establishing the rationale for a focused investigation of South Koel’s hydrology under climate variability and land-use and land cover change, it lays the conceptual foundation for the analyses to follow.