Study on eco-restoration modes for plain rivers in Haihe River Basin Ⅰ: eco-restoration mode

Based on the analysis of the relationship between the weight for stability of rock ripraps and flow velocity, a discussion was made on the stability of ripraps in plain rivers and mountainous rivers.

Ecological groundwater level and quantity regulation in plain region of Liaohe Watershed;

Similarity criterions and design method of hydraulic models with a movable bed for plain rivers carrying fine sediment;

Summary on tongsan highway mayihe bridge design on plaining wide-fleet river several bridges on one river flow distribution;

Based on expatiating the dynamic characters of groundwater level,we analyzed the period of groundwater level variation by the spectrum analysis method,also made the optimization on observation frequency of groundwater monitoring network in the plain of Shiyanghe River Basin.