Method for determining suitable distribution area of oncomelania in river and lake beaches

Abstract

The invention provides a method for determining a suitable distribution area of oncomelania in river and lake beaches. The method comprises the following specific steps: carrying out grid division on a research beach; according to the requirement of oncomelania on the living environment, selecting reasonable oncomelania habitat suitability indexes; classifying the suitability index standard of the oncomelania habitat according to the suitability degree, determining a suitability index classification threshold according to classification, and drawing a preference curve of the oncomelania to the suitability index; obtaining an actual value of the suitability index selected by each grid region of the beach; and calculating the suitability index of the indexes according to the actual value of the suitability index of each grid and the preference curve, and deducing the position and the area of the suitable distribution area of the oncomelania in river and lake beaches. According to the method, the position and area of the suitable distribution area of the oncomelania in river and lake beaches are quantitatively obtained, the problem that a systematic method for determining the suitable distribution area of the oncomelania in river and lake beaches does not exist at present is solved, and an important technical means is provided for accurate oncomelania inhibition and disease prevention of river and lake 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 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 snails. Habitats, but not all beach or all positions of the beach are distributed with snails, therefore, the study of the suitable distribution area of ...

AI Technical Summary

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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