The STEMMUS was designed as such that different modules can be “plug-in” easily. Currently, the freezing-thawing module is under development. The further development will be carried out to include biogeochemical cycle, and interactions with groundwater flow.
Figure 1. The further development of STEMMUS, considering freezing/thawing process, biogeochemical cycle and interactions with groundwater flow.
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你好我是西北农林科技大学的学生，我们想将土壤干层水分恢复。人工林苹果园转为这种粮食作物玉米，土壤水分会有所恢复。降雨尤其是在长武地区，降雨入渗很快，有的2年就恢复好几米，往下随之运移的除了土壤水分以外，还有硝酸盐，由于硝酸盐是污染物，运移很快就会进入地下水，从而引起地下水污染。尤其是在黄土丘陵区，土壤层较薄的话，硝酸盐进入地下水就会很快。这是我们发现的现象，1.但是我们想去做个预测，多少年硝酸盐能进入地下水里面，可以利用模型对这个过程进行预测，模型的话，可以选择DNDC、HYDRUS、构建STEMMUS上面加上N的运移方程，耦合进来，预测是否会进入地下水，多长时间进入地下水。2.同时可以做个调查，对地下水进行取样，很多地方会对饮用水进行取样调查，看看是否引用水中是否存在硝酸盐，看一下是否会超标。所以我们目前想用hydrus的溶质运移构建进STEMMUS，请问有什么好的思路吗？
Hi, thanks a lot for your questions. And i am sorry for the late response. What you suggested is interesting (coupling solution transport into STEMMUS), and i think that could address the questions you asked. You can also try other models as you mentioned for comparison for example.