Nonlinear Changes in Land Cover and Sediment Runoff in a New Zealand Catchment Dominated by Plantation Forestry and Livestock Grazing

摘要: Land cover can change frequently on intensively managed landscapes, affecting water quality across different spatiotemporal scales. Multi-resolution datasets are necessary in order to assess the extent and trends of these changes, as well potential cross-scale interactions. In this study, both spatial temporal analyses land disturbance (i.e., soil exposure from vegetation removal) were performed ranging daily yearly time Time-series compared against variables total suspended solids (TSS), turbidity, visual clarity for Hoteo River catchment North Island New Zealand 2000–2013 period. During forest harvest recovery phases, exotic forests dominant disturbance, up five times area grassland disturbance; while after recovery, grasslands assumed role, 16 disturbance. TSS field sampling (2000–2013) TSS-event (2012–2014) displayed distinct nonlinear patterns, suggesting that major events, sediment is stored landscape exhausted a period build-up follows until next event. also showed connection between connected clarity, with having be indicator. Future research should conducted at even finer scales over longer periods identify effects localized disturbances downstream quality.