2021年天津市市级水土流失动态监测结果分析  

Dynamic Monitoring Results of Soil and Water Loss at Municipal Level in Tianjin City in 2021

作　　者：刘一诺 LIU Yi-nuo(Tianjin Soil and Water Conservation Workstation,Tianjin 300074,China)

机构地区：[1]天津市水土保持工作站,天津300074

出　　处：《海河水利》2023年第5期1-5,共5页Haihe Water Resources

摘　　要：研究2021年天津市市级监测区土壤侵蚀强度等级变化及空间分布情况,科学评价天津市市级监测区内现阶段水土保持工作情况,判断今后水土保持的重点工作方向。通过综合运用遥感解译、实地调查和模型计算的方式方法,得出天津市2021年市级监测区土壤侵蚀状况,并将监测结果与2020年市级监测区水土流失动态监测成果进行对比分析。2021年天津市市级监测区现有水土流失面积18.45 km^(2),占市级水土流失动态监测区总面积的0.18%,以轻度侵蚀为主。与2020年相比,水土流失面积减少1.97 km^(2),减幅9.65%。水土流失总体呈减少趋势。天津市市级水土流失动态监测区内水土流失面积总体下降,区域水土保持功能稳步提升,水土流失主要发生在局部生产建设活动人为扰动用地,需进一步加强生产建设项目建设过程的水土保持监管。This paper studies the changes and spatial distribution of soil erosion intensity grades in Tianjin City’s municipal monitoring areas in 2021,scientifically evaluates the current status of soil and water conservation work in the municipal monitoring areas of Tianjin,and determines the key directions for future soil and water conservation work.By comprehensively using remote sensing interpretation,field investigation,and model calculation,the soil erosion status in Tianjin’s municipal monitoring areas in 2021 is obtained,and the monitoring results are compared and analyzed with the 2020 dynamic monitoring results of soil and water loss in the municipal monitoring areas.In 2021,the total area of soil and water loss in Tianjin’s municipal monitoring areas was 18.45 km^(2),accounting for 0.18%of the total area of the municipal dynamic monitoring areas,mainly showing slight erosion.Compared with 2020,the area of soil and water loss decreased by1.97 km^(2),with a decrease of 9.65%.Overall,soil and water loss shows a decreasing trend.The overall area of soil and water loss in the municipal dynamic monitoring areas of Tianjin has decreased,and the regional soil and water conservation function has steadily improved.Soil and water loss mainly occurs in the disturbed land of local production and construction activities,and further strengthening the supervision of soil and water conservation in the construction process of production and construction projects is needed.

关 键 词：市级监测区 水土流失 动态监测 2021年 天津 

分 类 号：S157.1[农业科学—土壤学]