Chinese Academy of Sciences

Chaojun Li

Fei Chen

Yujie Yang

Jinfeng Wang

Miao Zhou

Qin Li

Luhua Wu

Xiaoyong Bai

Yuanhong Deng

Zeyin Hu

Yichao Tian

Shijie Wang

Guangjie Luo

Min Liu

Yuanhuan Xie

Shiqi Tian

Qian Lu

Chen Ran

Huiwen Li

Yue Cao

Jianyong Xiao

Qinghuan Qian

Cheng Zeng

The present invention discloses a method for estimating soil organic carbon in karst area, including: step 1, establishing a soil organic carbon estimation model for the karst area; step 2, revising a soil depth; step 3, subtracting an exposure rate of bedrock for different types of soil and positive and negative terrains; step 4, revising a soil organic carbon density estimation formula for different types of soil and positive and negative terrains; and step 5, revising a soil organic carbon storage estimation method. This invention has solved the problem of overestimating soil organic carbon pool by existing methods, has improved the calculation accuracy, and has promoted the research process of soil carbon cycle in karst area.

Method for estimating soil organic carbon in karst area

Methods and systems for estimating a surface runoff based on a pixel scale are disclosed. In some embodiments, the method includes the following steps: (1) calculating a vegetation canopy interception water storage, a litterfall interception water storage, and a soil water storage according to an obtained original remote sensing dataset of a climate element in a study area; (2) calculating a vegetation-soil interception water conservation in the study area based on an established vegetation-soil interception water conservation estimation model according to the vegetation canopy interception water storage, the litterfall interception water storage, the soil water storage, and monthly precipitation; and (3) calculating a surface runoff in the study area based on an established water balance water conservation estimation model according to the monthly precipitation, monthly snowmelt, monthly actual evapotranspiration, and the vegetation-soil interception water conservation in the study area.

Method and system for estimating surface runoff based on pixel scale

The present invention relates to a method for determining a surface runoff yield in a vegetation-covered area. The present invention improves and integrates a water conservation model with a Zhang's model based on remote sensing data. The present invention constructs a new method for calculating a surface runoff yield in a vegetation-covered area on a spatial pixel scale based on a water balance equation of the vegetation-covered area. This method utilizes real-time dynamic multi-temporal remote sensing data to calculate a vegetation canopy interception water storage, a vegetation litterfall interception water storage, a soil water storage change, a vegetation water conservation, a vegetation evapotranspiration and a vegetation runoff yield. The method realizes the long-term dynamic estimation of the surface runoff yield in regional and global vegetation-covered areas on a spatial pixel scale. It has the advantages of being efficient, fast, accurate, and applicable to large-scale vegetation-covered areas.

Method for determining surface runoff yield in vegetation-covered area

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Guiyang, China

Chaojun Li