Stable isotope composition of particulate organic matters and dissolved nitrate in the Jinshui River, Upper Han River Basin Geochemical evolution processes of soil major elements in the forest-dominated Jinshui River Basin, the upper Hanjiang River Impacts of forest vegetation on water environment of the Jinshui River Basin in the Upper Han River Identifying sources of particle organic carbon in surface water based on stable isotope tracing in the Jinshui River