Evaluation method for measuring influence of land utilization on drainage basin non-point source pollution migration

A non-point source pollution and watershed technology, applied in the evaluation field of measuring the impact of land use on the migration of non-point source pollution in watersheds, to achieve the effect of simplifying the ecological process

Active Publication Date: 2021-06-25
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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However, the limitation of this type of model is that it cannot study the m

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  • Evaluation method for measuring influence of land utilization on drainage basin non-point source pollution migration
  • Evaluation method for measuring influence of land utilization on drainage basin non-point source pollution migration
  • Evaluation method for measuring influence of land utilization on drainage basin non-point source pollution migration

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Embodiment Construction

[0043] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0044] refer to figure 1 , describing an evaluation method for measuring the impact of land use on the migration of non-point source pollution in a watershed. The method of the present invention will be described in detail below by taking a specific research basin as an example. The method includes the following steps:

[0045] Step 1: Build the basic database. Build a basic database to obtain digital elevation data in the research watershed (such as figure 2 shown), land use data ( image 3 ),slope( Figure 4 ), river course ( Figure 5 ), flow direction ( Figure 6 ),flow( Figure 7 ), transform all spatial data into a unified projected coordinate system and reference ellipsoid; divide the study area into 24 sub-basins based on digital elevation data and hydrological data ( Figure 8 ); based on remote sensing images to extract and correc...

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Abstract

The invention relates to an evaluation method for measuring influence of land utilization on drainage basin non-point source pollution migration. The evaluation method comprises the following steps: 1, constructing a basic database; 2, classifying the soil of the research drainage basin according to a hydrological soil type classification standard; 3, endowing CN values to different land use types of the research drainage basin; 4, calculating a dynamic action coefficient; 5, calculating a resistance action coefficient; and 6, calculating a land utilization influence coefficient. The method is suitable for the small watershed lacking hydrological monitoring data, and has the advantages that the complex ecological process is simplified, and the key area causing pollution to the water body is effectively identified, so that the control means are selected in a targeted manner, and the risk to the aquatic ecosystem is effectively reduced at low cost.

Description

technical field [0001] The invention relates to an evaluation method for measuring the impact of land use on the migration of non-point source pollution in a watershed. Background technique [0002] Land use change is one of the important factors affecting the migration of non-point source pollution. Small watersheds in peri-urbanized areas are highly sensitive to the disturbance of human activities, especially to changes in land use patterns, which lead to significant changes in non-point source pollution. Most studies evaluate the extent of non-point source pollution from the perspectives of non-point source pollution traceability, hydrological processes, and influencing factors in order to reduce negative impacts. Many studies have concluded that increasing forest land and establishing riparian vegetation buffer zones are the best options for suppressing non-point source pollution. However, in which plots to increase forest land or vegetation buffer zone? How much non-...

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Application Information

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IPC IPC(8): G06F30/20G06F17/15G06F119/14
CPCG06F30/20G06F17/15G06F2119/14
Inventor 钱瑶唐立娜陈丁楷孙朗王保盛
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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