Water surface rate value domain measuring and calculating method suitable for urban water ecological protection

Abstract

The invention discloses a water surface rate value domain measuring and calculating method suitable for urban water ecological protection. The method comprises the following steps of measuring the DEMelevation data; defining a rainwater control subarea; acquiring the typical year day-by-day meteorological data, and establishing a rainfall model and an evaporation model; screening out the rainfallcourses which do not form runoff, and carrying out first rain reduction at the same time; determining a comprehensive runoff coefficient; calculating a permeability coefficient and infiltration amount; making an urban water system water circulation target; and constructing a water depth change model, and calculating the suitable urban water surface rate. According to the method, the urban water surface rate can be quickly and accurately calculated, the spatial attribute of the urban water surface rate value domain indexes is enhanced, and the reasonability of the urban water area layout is improved.

Description

technical field [0001] The invention relates to the technical field of urban planning, in particular to a method for measuring and calculating the value range of water surface rate suitable for urban water ecological protection. Background technique [0002] Urban water surface rate usually refers to the ratio of the area of ​​rivers (rivers, rivers, canals, etc.), lakes (natural or artificial lakes), wetlands (natural or artificial wetlands) and other areas that carry water functions to the total area of ​​the city within a certain area. Urban water surface has multiple service functions and economic value (He Junshi, Wu Di, Wei Guo. Analysis of urban suitable water surface rate and its influencing factors[J]. Arid Area Resources and Environment, 2008,22(2):6-9.DOI: 10.3969 / j.issn.1003-7578.2008.02.002.). Urban water surface ratio is a key indicator that affects urban ecosystems and flood control and drainage systems, and has an important impact on urban disaster preventio...

AI Technical Summary

Problems solved by technology

The problems of this judgment method include: 1) lack of pertinence, the underlying surface varies greatly in different regions, and some areas are difficult to meet the specification requirements; 2) it is difficult to determine the unit boundary of the water surface rate statistics, which is greatly affected by the boundary range line in practice; 3) Insufficient scientific

[0008] 1. The water surface rate is greatly affected by subjectivity and experience;

[0009] 2. There is no effective means in the existing technology to plan the urban water surface rate for the purpose of urban aquatic ecological health

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