Research on non-point source pollution spatial distribution of Qingdao based on L-THIA model

Non-point source (NPS) pollution originating from agricultural development is the root cause of environmental pollution. Herein, we explore the integration of a NPS pollution model with novel spatial information technology to further understand the effects of enhanced crop development on local water resources.This study was based on land use, soil and precipitation data from studies conducted using the L-THIA (Long-Term Hydrologic Impact Assessment, L-THIA) model, in concert with an analysis of the spatial distribution of NPS pollution within the study area. The L-THIA model was consistent in anticipating increased pollution levels and, therefore, may be used to provide information critical to land use and environmental protection planning.