Research on the Integrated Water Management of Linghe Reserve——Analysis of the Changing Characteristics of Sediment and Water in Linghe River Basin

The water and sediment variations of Linghe River Basin were investigated based on the analysis of the measured runoffs and sediment discharges at the representative hydrometric stations along Linghe River Basin. The annual and interannual variation trends of runoff,sediment discharge and concentration at the Chaoyang hydrometric station were summarized,and the interannual variation trends of runoff,sediment discharge and concentration at different hydrometric stations were also compared. Meanwhile,the runoff variations along the Linghe River Basin were discussed,and the characteristics of sediment and water of Large Linghe River Basin and Small Linghe River Basin were compared as well.The results showed that in Linghe River Basin,runoff and sediment discharge is distributed unevenly within a year and mainly concentrated in flood season( Jun.-Sep.); the annual variation is significant,runoff increases along the way; while sediment discharge increases in hilly areas,and decreases in plain area.