Primary analysis of soil erosion intensity in qiaozigou watershed based on gis 的下莊小流域土壤侵蝕量預測研究
The soil erosion intensity of the whole watershed is assessed with the quantitative method of gis and rs . the results of the study are followed : 1 最后,借助gis和遙感等先進技術(shù)手段,對整個小流域的土壤侵蝕狀況進行了定量評價分析。
The outcomes show that the sequence of soil erosion of types of land use in different regions is different and the sequence of soil erosion of types of land use in different periods of the same regions is uncertainty ; the occurred rate of soil erosion of new wasteland is higher than that of idle wasteland for years ; the occurred rate of soil erosion of grassland is higher ; the occurred rate of soil erosion of non - irrigated farmland is high and the soil erosion intensity of land used for construction is great during construction and becomes smaller after completion 結(jié)果表明:不同區(qū)域土地利用類型的土壤侵蝕序列各不相同,而同一區(qū)域不同時期土地利用類型的土壤侵蝕序列不確定;新出現(xiàn)的難利用地比長期閑置的難利用地土壤侵蝕發(fā)生率高;草地土壤侵蝕發(fā)生率偏高;耕地中旱地的土壤侵蝕發(fā)生率高;建設(shè)用地建設(shè)時土壤侵蝕強度大,而建成后土壤侵蝕強度小。
The paper introduces and amends the composite indexes of soil erosion intensity and regional soil erosion intensity and conducts quantitative analysis on spatial relationship of types of land use and soil erosion intensity of whole china territory , the middle and lower areas of liaohe river , headwater area of danjiangkou reservoir of south - north water transfer project of hubei part and 4 regions of huidong county in guangdong based on sum up of general study methods of spatial relationship of land use and soil erosion 摘要在總結(jié)土地利用與土壤侵蝕空間關(guān)系一般研究方法的基礎(chǔ)上,引入并修正了土壤侵蝕強度綜合指數(shù)和區(qū)域土壤侵蝕強度綜合指數(shù),時整個中國境內(nèi)、遼河中下游地區(qū)、南水北調(diào)丹江口水庫水源區(qū)湖北部分和廣東省惠東縣4個區(qū)域土地利用類型與土壤侵蝕強度空間關(guān)系進行了定量比較分析。
According to the current situations of soil water erosion in city keramay , factors affecting soil erosion loss were analyzed , soil erosion intensity was graded and the soil erosion type was divided into several zones . specially , the water and wind erosion features were analyzed and the features were considered as the major factor for division of soil erosion type 論文從克拉瑪依市水土流失現(xiàn)狀入手,通過重點分析影響水土流失的幾個重要因素,對當?shù)赝寥狼治g強度進行了分級及對土壤侵蝕類型進行了分區(qū),特別對水力風力交錯侵蝕特征進行了分析,并以水力風力侵蝕特征作為土壤侵蝕類型分區(qū)的主要依據(jù)。