Sciunit object for basin discharge simulation

This sciunit object has two executions. - e1 is using UEB output "SWIT.nc" to prepare rain-plus-melt input xmrg files for RDHM sac model. Results saved in "SAC_input" folder. - e2 is using the xmrg files to run RDHM sac model to generate time series output of basin discharge. Results saved in "SAC_out" folder.该SciUnit对象包含两个执行过程。其中，e1过程利用UEB输出文件“SWIT.nc”准备雨加融雪输入的xmrg文件，以供RDHM sac模型使用。相关结果保存于“SAC_input”文件夹中。e2过程则利用这些xmrg文件运行RDHM sac模型，以生成流域流量时间序列输出。结果同样保存于“SAC_out”文件夹。