Research on ecological restoration zoning of county land space based on land type:taking Pucheng County in Shaanxi Province as an example
This paper takes Pucheng County in Shaanxi Province as an example,and adopts the zoning path of"bottom-up units,top-down zoning"to divide land types based on geomorphologic type data,soil type data and the third national land survey data and take them as the basic units of ecological restoration zoning of national land space,and combine them with the core ecological functions and dominant ecological problems,to propose a suitable ecological restoration zoning of national land space in the county.The county land space ecological restoration zoning program is proposed.The results show that:(1)Pucheng County includes 4 landform types,7 soil types and 15 land use type units;88 land type units and 298 units have been divided.(2)The habitat quality,soil and water conservation,and water-source nourishment functions along Qiaoshan Mountain in the northwestern part of the county as well as along the Luohe River in the eastern part of the county are relatively strong,but it is also facing a higher risk of torrential rainfall and flooding and erosion,as well as a stronger threat of ecosystem degradation.Food production,carbon sequestration and oxygen release capacity are generally high in the county,and human activities are most concentrated near the built-up areas.(3)A total of eight land space ecological restoration sub-areas have been divided in Pucheng County,and corresponding restoration strategies are proposed based on land types,ecological functions and ecological problems.This study can provide new zoning ideas and methodo-logical references for ecological restoration research in the county.
land space ecological restoration zoningland typeecological functionecological prob-lemsPucheng County
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