Novel insights into source apportionment of dissolved organic matter in aquifer affected by anthropogenic groundwater recharge: Applicability of end-member mixing analysis based optical indices

Xu Cao, Wei He, Mengqing Fan, Wei He, Yuanyuan Shi, Tongyan An, Xiaorui Chen, Zhanhao Zhang, Fei Liu, Yi Zhao, Pengpeng Zhou, Cuibai Chen, Jiangtao He