Spatial–Temporal Change in Paddy Field and Dryland in Different Topographic Gradients: A Case Study of China during 1990–2020

As a country with a vast area and complex terrain, the differentiation between paddy field and dryland under different topographic gradients in China is difficult. Based on a land-use grid data set with an accuracy of 1 km, this study applied the Topographic Potential Index and used land-use transit...

Full description

Saved in:
Bibliographic Details
Published in:Land (Basel) 2022-10, Vol.11 (10), p.1851
Main Authors: Xie, Shuai, Yin, Guanyi, Wei, Wei, Sun, Qingzhi, Zhang, Zhan
Format: Article
Language:English
Subjects:
Agricultural land
Arable land
Arid regions
Arid zones
dryland
Elevation
Environmental aspects
Forecasts and trends
Land resources
Land use
land-use change
Landscape
landscape characteristics
Mountain regions
Mountainous areas
paddy field
Photothermal conversion
Precipitation
Remote sensing
Rice fields
Slopes
Soil erosion
Soils
Surface water
topographic gradient
Topographical drawing
Topography
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As a country with a vast area and complex terrain, the differentiation between paddy field and dryland under different topographic gradients in China is difficult. Based on a land-use grid data set with an accuracy of 1 km, this study applied the Topographic Potential Index and used land-use transition matrices and landscape analysis to compare the change in dryland and paddy field in China from 1990 to 2020 at different elevations, slopes, and slope aspects. The results indicate that paddy field and dryland were mostly distributed in areas with better photothermal conditions. However, in recent years, the paddy field and dryland on the “sunny” slope decreased. Specifically, the area of paddy field and dryland on the southeast, south, and southwest slopes decreased, while they increased on the northwest, north, and northeast slopes. From 1990 to 2020, land conversion among paddy field, dryland, and other land use was mostly concentrated in the third ladder (
ISSN:2073-445X
2073-445X
DOI:10.3390/land11101851