Page 16 - 2022年第53卷第2期

A method for determining and dynamic controlling the limit water level
of lakes by classification and stages

1，2 1，2 1，2
ZHOU Jianzhong ，LIU Zhiming ，LOU Sijing ，
HUANG Wen 1，2 ，XIAO Wenjing 1，2 ，WU Huiling 1，2
（1. School of Civil and Hydraulic Engineering，Huazhong University of Science and Technology，Wuhan 430074，China；
2. Hubei Key Laboratory of Digital Valley Science and Technology，Wuhan 430074，China）

Abstract： In the field of drought resisting， China has not yet established drought characteristic indexes
such as water level （flow） that can be used for drought emergency management. Drought emergency manage⁃
ment such as hydrological drought reporting， drought warning， drought consultation， emergency response，
and water scheduling often lacks scientific basis. According to Measures for the Determination of Drought
Limit Water Level （flow） formulated by the Ministry of Water Resources in 2011， the concept of drought
limit water level （DLWL） was put forward for the first time， but the method for determining the DLWL
was not specifically formulated for lakes. Referring to the methods of determining DLWL of rivers and reser⁃
voirs， only one DLWL is used as a drought warning indicator throughout the year， which lacks classifica⁃
tion and staging standards， and lacks operability in practice. Therefore， considering the differences of pro⁃
duction， living and ecological water demand priorities and guarantee levels in different periods， combined
with the water inflow characteristics of lakes， this paper formulates the classification and staging standards
of Lake DLWL，establishes a general method for determining Lake DLWL by classification and staging ac⁃
cording to different lake types，and puts forward a practical method. The reliable early warning and dynam⁃
ic control method of Lake DLWL provides scientific basis and technical support for drought prevention com⁃
mand and decision-making. The determination and dynamic control method of drought limited water level
proposed in this paper has been successfully applied in Honghu Lake.
Keywords：lake drought limit water level；graded and staged；drought prevention；dynamic control

（责任编辑：于福亮）

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