Nothing in the river: cruise routes on the Rhine and Danube are changed due to low water and trips canceled.This is what the big shipping companies look like.It is only a few centimetres, but still: Thanks to the rain, the levels on German rivers are rising again – for example on the Rhine, where the water level had finally fallen even to the minus area, i.e. below the set zero mark.Nevertheless, the amount of water for shipping is still not suf…