2.2. Lack of practical basis
A blue-green space is a measure of social environment, economy, and
health and closely related to the happiness and satisfaction of urban
residents. At present, many evaluation index systems of urban water body
and green space have been developed as the basis for evaluating urban
health and urban ecological civilization and have promoted the
construction of blue-green spaces. In existing studies, water bodies and
green spaces were separately evaluated without considering the
coordinated planning and comprehensive urban ecosystems. In addition,
without enough reliable and comprehensive indices, it is impossible to
evaluate the spatial structure and ecological functions of blue-green
spaces. In addition, water conservancy, greening, and landscape
departments have different planning functions, so the separate
construction of water body and green space have resulted in many
problems. such as blue-green division. Natural hydrological conditions,
land-water interlaced zones, or the connectivity of urban water-green
corridors is not considered, thus affecting the integrated construction
of urban blue-green spaces and severely limiting the quality of the
constructed urban ecological environment. Therefore, it is particularly
important to determine the appropriate evaluation indices and evaluation
criteria based on previous studies and establish a scientific index
system and an evaluation method to evaluate the degree of blue-green
integration in urban planning.