The construction of happy rivers and lakes is the direction of river and lake governance and protection in the new era

which is of great significance for ensuring the health of rivers and lakes and the high-quality development of river basins. To quantitatively evaluate the effectiveness of the construction of happy rivers and lakes

this article analyzes the definition and connotation of happy rivers and lakes from the background of its proposal. Based on the framework of the River of Peace

Health

Livability

Civilization

Humanities

and Enriching the People

a happy river and lake evaluation index system in Jiangxi Province is constructed through literature research

questionnaire survey

and expert consultation

which includes the “target-level

criterion-level and indicator-level” and sets 21 evaluation indicators.The article determines the evaluation criteria for each indicator based on reference standards and literature

constructs a comprehensive weighted evaluation model to quantitatively calculate happy rivers and lakes index. Taking the Yishui River Basin in Yihuang County

Jiangxi Province as a typical case

this study aims to evaluate the effectiveness of the construction of happy rivers and lakes in the Yishui River Basin. The study verifies the proposed evaluation system for happy rivers and lakes can better reflect the objective reality of the Yishui River Basin and provide reference for the evaluation of happy rivers and lakes in Jiangxi Province.