Landscape Pattern Changes Affect Runoff and Sediment Yield in the Nandong Underground River System in Southwest China

Since 2008, soil and water treatment ecological restoration have been applied in the karst areas of Southwest China, but effect treatments fault basins is not clear. As a typical watershed faulted basin, studying influence landscape pattern changes on runoff sediment yields Nandong underground river system (NURS) helps to establish relationship between changes. It provides theoretical basis effective method for management assessment, basins. The vegetation topographic factor (VTF) was constructed using normalized index (NDVI), digital elevation model (DEM) water-system map from 2000 2018. On VTF classification, (VTLI) calculated FRAGSTATS software, effects VTLI NURS yield were analyzed. study found following: (1) PD, IJI, LSI SHDI positively correlated with (p < 0.01), correlation coefficients 0.693, 0.668, 0.551 0.582 0.62, 0.635, 0.627 0.63, respectively. AI CONNECT significantly negatively −0.551 −0.596, −0.627 −0.446, LPI DIVISION discharge, 0.05), −0.179 0.271, (2) interpretation increased 0.639 0.778, transport decreased 0.809 0.613. (3) In urban areas, persistent. basin mountain edge area. mountainous unchanged, has an antipersistence trend. project had achieved obvious results, change production reduced production. capacity conservation high slope area recovered showed trend sustainable development. Due expansion brought about by economic development, around city declined, it development Policymakers should strengthen environment coordinate within areas.