PROGRESS IN GEOGRAPHY ›› 2021, Vol. 40 ›› Issue (7): 1208-1219.doi: 10.18306/dlkxjz.2021.07.011

• Articles • Previous Articles     Next Articles

Spatial pattern of gully erosion control urgency in black soil farming area

LI Quanfeng1,2(), LI Jicheng1, YU Mingpeng3,*(), GUO Xinxin1   

  1. 1. College of Public Administration and Law, Northeast Agricultural University, Harbin 150030, China
    2. Land Remote Sensing Big Data Technology Innovation Center, Harbin 150030, China
    3. College of Resources and Environment, Northeast Agricultural University, Harbin 150030, China
  • Received:2020-04-13 Revised:2021-05-02 Online:2021-07-28 Published:2021-09-28
  • Contact: YU Mingpeng E-mail:quanfeng.li@neau.edu.cn;yump123456@gmail.com
  • Supported by:
    National Natural Science Foundation of China(41901208);Philosophy and Social Science Foundation of Heilongjiang Province(19GLH017);Youth Innovative Talents Training Program of Regular Higher Education Institutions of Heilongjiang Province(UNPYSCT-2020117);Scholar Project of Northeast Agricultural University(18QC10);Natural Science Foundation of Heilongjiang Province(LH2019D003)

Abstract:

A comprehensive understanding of the development status of erosion gullies and the urgency of their erosion control can provide an important reference for effectively identifying the direction and key areas of regional gully erosion prevention and control. Combined with the spatial data of erosion gullies, this study constructed an evaluation index of regional gully erosion control urgency. The distribution characteristics of erosion gullies in the black soil farming area of Hailun City in 2017 were analyzed at the town and township level and the grid level, revealing the extent of gully erosion and its spatial distribution patterns. The results show that: 1) Quantitatively, the distribution of erosion gullies in Hailun black soil farming area is unbalanced. The length of gullies is mainly micro/small (≤ 500 m), and the area of gullies is of class I and II (≤ 0.8 hm2). Overall, the erosion gullies are of large number, short length, and small area. 2) Spatially, the density of erosion gullies at the grid level gradually increased from the southwest to the northeast, while their dissected degree was mainly light, and there was no significant spatial difference across the area. The density of erosion gullies at the town and township level was mainly low, and the gullies were mainly distributed in the west of Hailun, while their dissected degree was mainly moderate/intensive and they are mainly distributed in the northwest and southeast of Hailun City. 3) The erosion control urgency of erosion gullies in Hailun black soil farming area in 2017 was mainly in the low urgency state, accounting for 67.06% of the area, which was mainly distributed in the plain and hilly areas, located in the western townships of Hailun; and the urgent/extremely urgent states were mainly found in the low mountain and hilly areas, located in the northeast of Hailun. In the planning of regional gully erosion control, the city government should give priority to the prevention and control of serious erosion areas according to the urgency state of town and township gully erosion control, while the town and township governments can carry out field investigation and key area monitoring according to the urgency of gully erosion control identified at the grid scale.

Key words: erosion gully, distribution characteristics, monitoring and supervision, erosion control urgency, farming land, black soil area in Northeast China