[Characteristics of Carbon Transportation Under Rainfall Events and Associated Carbon Loss Evaluation in Loess Plateau, China: A Case Study of Yangjuangou Dam Watershed].

In this study, by monitoring carbon transportation and its rainfall-runoff process during the rainy season in Loess Plateau's Yangjuangou dam watershed, we analyzed changes in carbon transportation driven by rainfall and further evaluated the C loss flux for the dam watershed. Results showed that the monthly C wet deposition flux for the wet and dry seasons were 3.33 kg·hmand 2.18 kg·hm, respectively, which were only small contributions to C transportation for the watershed. C transportation under the rainfall-runoff process in this watershed can reach 944.89 kg·km and 300.29 kg·km in August and September, respectively. Different intensities of rainfall runoff lead to different C loss processes, wherein dissolved inorganic carbon (DIC) is the main C form. Under small rainfall events, the output of dissolved total carbon (DTC) in this watershed was 156.98 kg·km; and the output of moderate rainfall events was 284.60 kg·km. Finally, we determined that the C loss modulus of the Yangjuangou watershed was 1.89 kg·(km·mon) in the rainy season, thus the C loss modulus for the study area could reach 2.70 kg·(km·a).