TY - Journal of Geographical Sciences A1 - WANG Lixia, REN Zhiyuan T1 - Spatial-temporal differences in in-stream flow requirement based on GIS: A case study of Yan’an region, northern Shaanxi Y1 - 2008-02-25 00:00:00.0 JF - Journal of Geographical Sciences JO - Journal of Geographical Sciences SP - 107 EP - 114 VL - 18 IS - 1 UR - {https://www.geogsci.com/EN/10.1007/s11442-008-0107-4} N1 - 10.1007/s11442-008-0107-4 ER -