怒江和澜沧江出山口径流模拟数据（1968-2021）
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基于DEM值高于2500m这一出山口定义，明确了怒江和澜沧江出山口流域范围（断面位置分别见怒江和澜沧江出山口流量.xls数据文件）。分析怒江和澜沧江出山口上、下游国家水文站的月径流相关性，结果表明怒江与澜沧江上、下游水文站月径流序列之间具有极强的相关性，怒江嘉玉桥站与道街坝站月径流序列散点图的R2约为0.96，而澜沧江昌都站与旧州站月径流序列散点图的R2也超过了0.93。这也体现了怒江与澜沧江高山峡谷型流域径流的特点，即上、下游径流之间相关性极强。因此，研究利用流域出山口上、下游国家水文站径流数据序列，并结合各子流域内的降水量权重系数，计算了怒江（1980年-2000年和2018年-2021年）和澜沧江（1968年-2000年和2011年-2021年）出山口的月径流历史数据序列。
Based on the mountain pass definition of DEM value higher than 2500 m, the basin extents at the mountain passes of the Nujiang River and Lancang River were determined (the section locations are respectively shown in the data file "Monthly Discharge at the Mountain Passes of Nujiang River and Lancang River.xls"). This study analyzed the monthly runoff correlations between national hydrological stations upstream and downstream of the mountain passes of the Nujiang and Lancang Rivers. The results demonstrate that there is an extremely strong correlation between the monthly runoff sequences of the hydrological stations at the upstream and downstream reaches of the two rivers. The coefficient of determination (R²) of the scatter plot for the monthly runoff sequences of the Nujiang River's Jiayuqiao Station and Daojieba Station is approximately 0.96, while that of the Lancang River's Changdu Station and Jiuzhou Station exceeds 0.93. This also reflects the runoff characteristics of the alpine canyon basins of the Nujiang and Lancang Rivers, i.e., there is an extremely strong correlation between the upstream and downstream runoffs. Therefore, this study utilized the runoff data sequences from the national hydrological stations at the upstream and downstream of the basin mountain passes, combined with the precipitation weight coefficients within each sub-basin, to calculate the historical monthly runoff sequences at the mountain passes of the Nujiang River (1980-2000 and 2018-2021) and the Lancang River (1968-2000 and 2011-2021).
