A Method for Determining the Suitable Distribution Area of ​​Oncomelania snails in Hehuzhou Beach

Abstract

The invention provides a method for determining the suitable distribution area of ​​oncomelania beach snails in rivers and lakes, which includes the following specific steps: carrying out grid division on the research island beach; according to the needs of the snails for the living environment, selecting a reasonable oncomelania habitat suitability index; The degree of suitability classifies the oncomelania habitat suitability index standard, and determines the classification threshold of the suitability index according to the classification, draws the oncomelania preference curve for the adaptability index; obtains the actual value of the suitability index selected in each grid area of ​​the beach; according to The actual value of the suitability index of each grid and the suitability index of the preference curve are calculated, and then the location and area of ​​the suitable distribution area of ​​Oncomelania snails are calculated. The present invention quantitatively obtains the location and area of ​​the suitable distribution area of ​​Oncomelania snails in continental beaches, solves the problem of determining the suitable distribution areas of Oncomelania snails in rivers, lakes and continental beaches, and provides an important technical means for precise suppression of snails in rivers, lakes and continental beaches. .

Description

technical field [0001] The invention relates to the technical field of water conservancy rivers and lakes, in particular to a method for determining the suitable distribution area of ​​oncomelania on rivers, lakes and islands. Background technique [0002] Schistosomiasis is the most widely distributed disease among all parasitic diseases, and its infection rate ranks first among water-borne diseases. Its incidence covers 76 countries in the six regions of the World Health Organization. , Sudan and Brazil are particularly serious. Oncomelania is the only intermediate host of Schistosoma japonicum, which is widely distributed and the most harmful to animals. The staged water accumulation, vegetation conditions and special environmental factors on the beach provide good conditions for the survival and reproduction of Oncomelania. Habitats, but not all beach or all positions of the beach are distributed with snails, therefore, the study of the suitable distribution area of ​​o...

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Problems solved by technology

[0004] The present invention establishes the oncomelania habitat suitability index, standard and threshold, establishes the oncomelania preference curve for the adaptability index, and combines remote sensing image interpretation, on-site measurement and water flow numerical simulation to quantitatively obtain the suitable distribution area and position of oncomelania oncomelania. It solves the problem of determining the suitable distribution area of ​​Oncomelania snails in continental beaches that has not yet been systematically determined, and provides an important technical means for precise suppression of snails and disease prevention in continental beaches

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