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Impacts of different surface features on soil detachment in the subtropical region

International soil and water conservation Research 2021年第4期9卷 555-565页

作者： Qianhong Ma Keli Zhang Zihao Cao Zhicheng Yang Mengyao Wei Zaike Gu State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China School of Teacher Education Hebei Normal UniversityShijiazhuangHebei 050024China guizhou Provincial monitoring station of soil and water conservation GuiyangGuizhou 550002China

Near-surface features have a great influence on runoff and detachment processes by overland flow,but the contributions are still unclear on steep slopes with yellow soil in subtropical humid *** scouring experiments were conducted to investigate how near-surface features affect hydraulic parameters and detachment rate by overland *** treatments and a baseline(disturbed rootless bare cropland)were designed to identify the contributions from stem-leaves,litter,biological soil crusts(BSCs),root systems and non-disturbance,*** results showed that(1)the values of velocity,Reynolds number and Froude number for vegetated slopes were significantly lower than that of baseline,and stem-leaves made a greater contribution(average of 47.30%)to reducing kinetic energy than the other features;(2)the total contribution rate of grassland was 99.38%,and of this total,1.19,1.44,2.49,49.79 and 44.47%reductions were attributed to the stem-leaves,litter,BSCs,root systems and non-disturbance,*** system and non-disturbance dominated the detachment rate reduction;(3)with increasing flow rate or slope gradient,the total contribution rate remained between 98%and 100%;and(4)for each treatment,the relationship between detachment rate and hydraulic parameters remained constant,and the stream power was the best predictor to detachment *** study results are helpful in evaluating the effects of near-surface features on erosion control and providing reference for government decision-makers to choose appropriate soil conservation and management practices.

关键词： Vegetation soil tillage soil erosion Detachment rate Yellow soil

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Study of soil and water conservation Function on Slope with Different Planting Patterns for a Typical Small watershed in Karst Region of guizhou province

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International Journal of Technology Management 2014年第8期 101-105页

作者： LI Rui guizhou Provincial monitoring station of soil and water conservation Guiyang Guizhou 550002 China

Ten runoff plots with different planting patterns were established for experimental observation in Yangjichong small watershed of Longli County in Karst region of guizhou province. Results show that under the same rainfall condition, shrub land, natural grassland and abandoned land presented the best function of soil and water conservation. The function of soil and water conservation was poor for arbor planting pattern, because the shrub layer, herb layer and forest floor were not formed. Because of no-tillage, surface crust and other effects, the function of soil and water conservation in slope farmland was better than that in runoffplots with arbor planting pattern.

关键词： Karst region runoff plot runoff and sediment yield function of soil and water conservation planting pattern

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Simulating soil erodibility in southeastern China using a sequential Gaussian algorithm

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Pedosphere 2021年第5期31卷 715-724页

作者： Xuchao ZHU Yin LIANG Zhiyuan TIAN Yi ZHANG Yugang ZHANG Jing DU Xin WANG Yu LI Lili QU Mengmeng DAI State Key Laboratory of soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008(China) Taihu Basin monitoring Central station for soil and water conservation Taihu Basin Authority of Ministry of Water ResourcesShanghai 200434(China) College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100190(China)

soil erodibility(K)is a key factor of soil erosion,and its appropriate quantification and interpolation are vitally important for soil and water *** traditional point-represent-polygon approaches and common kriging method for the estimation of K,however,do not sufficiently represent the original *** objectives of this study were to simulate the spatial distribution of K using a sequential Gaussian algorithm and analyze the uncertainty in evaluating the risk of soil erodibility in southeastern *** determined 101 sampling points in the area and collected disturbed soil samples from the 0-20 cm layer at each *** properties were determined,and K was calculated using five common models:the EPIC(Erosion/Productivity Impact Calculator),approximate nomograph,Torri,Shirazi,and Wang *** the chosen models,the EPIC model performed the best at estimating K(KEPIC),which ranged from 0.019 to 0.060 t ha h(ha MJ mm)^(-1),with a mean of 0.043 t ha h(ha MJ mm)^(-1).The KEPIC was moderately spatially variable and had a limited spatial structure,increasing from south to north in our study area,and all spatial simulations using the cooperative kriging(CK)interpolation and the sequential Gaussian simulation(SGS)with 10,25,50,100,200,and 500 realizations had acceptable *** CK interpolation narrowed the range,and the SGS maintained the original characteristics of the calculated *** proportions of the risk area were 38.0% and 10.1%,when the risk probability for K was 60% and 80%,respectively,and high risk areas were mostly located in the *** results provide scientific guidance for managing the risk of soil erodibility in southeastern China.

关键词： geostatistical analysis K models kriging interpolation risk assessment soil erosion spatial simulation

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Baseflow variations and its causes in a subtropical watershed of southern China

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Journal of Mountain Science 2022年第10期19卷 2817-2829页

作者： LIU Zheng SHENG Fei LIU Shi-yu WANG Yan-yan ZHOU Chang-ming GU Chao-jun School of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China Key Laboratory of Poyang Lake watershed Agricultural Resources and Ecology of Jiangxi province Nanchang 330045China College of Resources and Environment Huazhong Agricultural UniversityWuhan 430070China Yangtze River Basin monitoring Center station for soil and water conservation Changjiang Water Resources CommissionWuhan 430012China

Baseflow is an essential component of streamflow and plays a crucial role in maintaining the stability of ***,few quantitative studies have identified the effects of leading factors on baseflow variation at the small watershed scale,especially in subtropical *** this study,the small watershed(Pengchongjian watershed,2.90 km2),located in Southern China,was considered to explore the quantitative impact of precipitation,evapotranspiration,temperature,and vegetation restoration on *** digital filter method was used to separate baseflow by daily streamflow records from 1983 to *** stepwise regression models were developed for selecting significant influencing factors of baseflow at seasonal and annual *** direct and indirect effects,as well as their quantitative relationships between baseflow and multiple factors,were clarified by the path *** results showed that filtered average annual baseflow significantly decreased(pwater resources in the watershed.

关键词： Baseflow separation Baseflow index Climate change Groundwater Pengchongjian watershed

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Runoff Characteristics of Different Stands in Dongjiang Lake Reservoir Area

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Meteorological and Environmental Research 2024年第4期15卷 36-38页

作者： Zhangquan ZENG Yaqin XIAO Dewei XIAO Qinxiang SHAN Ni ZHANG Yang SONG Canming ZHANG Rui YANG Hengshan Research station of Forest Ecosystem Hunan Academy of ForestryChangsha 410004China Zixing City Chukou Forest Farm Zixing 423407China Hunan Forest Grassland Fire monitoring and Dispatching Evaluation Center Changsha 410004China Zixing City Tian enshan Forest Farm Zixing 423406China Hunan water Resources Research&Development Center Changsha 410013China

Different forest stands in the Dongjiang Lake Reservoir area of Zixing were selected as the research objects to study the characteristics of runoff generation in different forest *** results showed that there was no significant difference in annual runoff among M3,M1,and M5,and no significant difference between each forest stand and the *** order was M3(22.75 mm)>M1(21.77 mm)>M5(20.14 mm).Forest vegetation generates less runoff through vegetation restoration compared to the control,indicating that forest vegetation reconstruction and restoration are beneficial for soil and water conservation.

关键词： Dongjiang Lake Reservoir area Stand Surface runoff Forest management

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Developing a new red band- SEVI-blue band (RSB) enhancement method for recognition the extra-high-voltage transmission line corridor in green mountains

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International Journal of Digital Earth 2023年第1期16卷 806-824页

作者： Hong Jiang Yong Zhang Jinglan Lin Xiaogan Zheng Hui Yue Yunzhi Chen Key Laboratory of Spatial Data Mining&Information Sharing of Ministry of Education National&Local Joint Engineering Research Center of Satellite Geospatial Information TechnologyAcademy of Digital China(Fujian)Fuzhou UniversityFuzhouPeople’s Republic of China Fujian soil and water conservation Experimental station FuzhouPeople’s Republic of China Lab of Live Working Tech for Power Transmission Fuzhou Power Supply Company of State Grid Fujian Electric Power Co.Ltd.FuzhouPeople’s Republic of China Fujian(Changting)soil and water conservation Research Center Soil and Water Conservation Center of Changting CountyLongyanPeople’s Republic of China

monitoring the extra-high-voltage transmission line corridor(EHVTLC)in mountains is critical for safe smart-grid ***,the transmission lines are so narrow that they are difficult to recognize using multispectral satellite images with a spatial resolution of 10 *** this study,we developed a new method using the red band–shadow-eliminated vegetation index(SEVI)–blue band(RSB)composite image to enhance the EHVTLC in green mountains(named RSB-enhancement method).Using this method,the EHVTLC becomes evident in the false-color synthesis of the RSB composite of the Sentinel-2 ***,we recognized and extracted approximately 342.45 km of the EHVTLC in a mountainous region of Fuzhou City,China,including a 46.73 km three-parallel-lane segment of 1000 kV and a 295.72 km two-parallel-lane segment of 500 *** analysis shows that the SEVI mean difference between the EHVTLC and the buffer zone reaches approximately 10%,and three landslides and 2.66 km^(2) soil erosion reside in the buffer zone which area is approximately 73.67 km^(2).Finally,the RSB-enhancement method can be used in other satellite images with spatial resolutions of greater than 10 m for enhancement and recognition the transmission line corridors in green mountains.

关键词： Enhancement method shadow-eliminated vegetation index(SEVI) transmission line lane(TLL) green mountains soil erosion

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Landscape Pattern of Ancient Terraces in Huangping County and Slopeto-Terrace Strategy

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Journal of Landscape Research 2016年第2期8卷 6-12页

作者： LAN An'jun ZHAN Fengli FU Yuwen ZHONG Jiusheng LIU Fayong YOU Boyu School of Geography and Environment Sciences Guizhou Normal University monitoring station of soil and water conservation in guizhou province Institute of South China Karst Guizhou Normal University Guiyang

Formation and development of ancient terraces proves that slope-to-terrace project is a signifi cant measure for conserving water and soil in mountainous areas. UAV remote sensing technology was applied to obtain RS images with a resolution ratio of 0.1–0.5 m, Arc GIS was applied for data processing, and Fragstats3.3 was used to calculate characteristic indexes, to study landscape pattern of 4 ancient terraces in Huangping County, guizhou province. The results showed that terrace landscapes and woodland landscapes in the study area account for nearly 80% of the whole landscape(terrace 30%, woodland 50%); mean area of single fi eld is mainly concentrated between 100 m^2 and 200 m^2, and height between 0.7 m and 1.7 m, breadth 0.5 m and 0.6 m; most terraces have a gradient of 5–25°, accounting for 70% of the total number of fi eld. The water and soil conservation concept in the ancient terraces provides references for the slope-to-terrace project and the water and soil loss control of slope farmland.

关键词： Ancient terrace Landscape pattern Slope-to-terrace Huangping County

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Factor value determination and applicability evaluation of universal soil loss equation in granite gneiss region

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water Science and Engineering 2009年第2期2卷 87-97页

作者： Wen-hai ZHANG Xing-nan ZHANG Zhi-dong GAO State Key Laboratory of Hydrology-water Resources and Hydraulic Engineering Hohai University Nanjing 210098 P. R. China soil conservation Experimental station of Jiagu Mountain Ganyu County Jiangsu Province Lianyungang 222100 P. R. China

Six types of runoff plots were set up and an experimental study was carried out to examine natural rate of soil and water loss in the granite gneiss region of northern Jiangsu province in China. Through correlation analysis of runoff and soil loss during 364 rainfall events, a simplified and convenient mathematical formula suitable for calculating the rainfall erosivity factor （R） for the local region was established. Other factors of the universal soil loss equation （USLE model） were also determined. Relative error analysis of the soil loss of various plots calculated by the USLE model on the basis of the observed values showed that the relative error ranged from -3.5% to 9.9% and the confidence level was more than 90%. In addition, the relative error was 5.64% for the terraced field and 12.36% for the sloping field in the practical application. Thus, the confidence level was above 87.64%. These results provide a scientific basis for forecasting and monitoring soil and water loss, for comprehensive management of small watersheds, and for soil and water conservation planning in the region.

关键词： granite gneiss region soil erosion universal soil loss equation factor value applicability evaluation

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Characteristics of runoff and sediment yield for two typical erodible soils in southern China

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International Journal of Sediment Research 2022年第5期37卷 653-661页

作者： Xuchao Zhu Yin Liang Lili Qu Longxi Cao Zhiyuan Tian Tong Liu Meng Li State Key Laboratory of soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences College of Advanced Agricultural Sciences University of Chinese Academy of Sciences College of Ecology and Environment Chengdu University of Technology National-Regional Joint Engineering Research Center for soil Pollution Control and Remediation in South China Guangdong Key Laboratory of IntegratedAgro-environmental Pollution Control and Management Institute of Eco-environmental and Soil Sciences Guangdong Academy of Sciences Hydrology and water Resources Investigation Bureau of Jiangsu province

Granite red soil(GRS) and Quaternary red clay(QRC) are two typical erodible soils in the red-soil region of southern China. Analytical and comparative studies of the characteristics of runoff and sediment yield for the two soils at various slopes are currently needed. The purpose of the current study was to clarify the characteristics of runoff and sediment yield for GRS and QRC at different slopes and to establish models for estimating sediment yield for the two soils. Forty-eight runoff microplots with four slopes(5°, 15°, 25°, and 35°) and two soils(GRS and QRC) were established and exposed to natural rainfall. Runoff and sediment yield were measured 10 times during the study period. Runoff and sediment yield for the two soils under the various slopes had similar temporal variations, and both increased with prior cumulative erosive rainfall. Runoff for GRS and QRC was moderately temporally variable, with coefficients of variation(CVs) from 46.2% to 60.6%, and sediment yield for QRC was strongly temporally variable, with CVs from 114.8% to 145.8%. Sediment yield for GRS increased with slope, but sediment yield for QRC first increased and then decreased, with a calculated inflection point of 18°, but runoff for both soils decreased with slope. The CVs of both runoff and sediment yield with slope for the two soils ranged from 3.6% to 88.0%, lower than the temporal variabilities, indicating that rainfall may have a larger impact than slope on runoff and sediment yield for QRC and GRS. Under the various slopes, runoff and sediment yield for both soils increased with rainfall and sediment yield increased with runoff, but the proportions of effective rainfall and runoff differed. Pedotransfer-function models based on rainfall, runoff, and slope accurately estimated sediment yield for the two soils, with the model fit coefficient of determination(R2) > 0.81 and the R2for verification >0.79. These results improve the understanding of the laws governing erosion for differe

关键词： Runoff and sediment characteristics Sediment-yield simulation Granite red soil Quaternary red clay Pedotransfer function Red-soil region

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Effects of rainfall and rocky desertification on soil erosion in karst area of Southwest China

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Journal of Mountain Science 2022年第11期19卷 3118-3130页

作者： PAN Li-dong LI Rui SHU Dong-cai ZHAO Li-na CHEN Mei JING Jun School of Karst Science Guizhou Normal UniversityGuiyang 550001China State Engineering Technology Institute for Karst Desertification Control Guiyang 550001China College of Resources and Environment Southwest UniversityChongqing 400715China guizhou Hydrology and water Resources Bureau Guiyang 550002China

monitoring and evaluating the evolution of rocky desertification timely and studying the characteristics of soil erosion under different rainfall patterns are of great scientific significance for regional soil and water conservation,rocky desertification control and ecological environment *** periods of remote sensing image data from 2005 to 2020 were selected to study the evolution characteristics of rocky desertification and its impact on soil erosion in the controlled boundary area of Shibantang hydrological station of Yeji River watershed,guizhou province,*** to the 408 erosive rainfall events,the soil erosion under different rainfall patterns in the watershed was *** results showed that:erosive rainfall events in the study area were mainly pattern A,accounting for 57.4%of the total rainfall events;the second was pattern B,accounting for 28.9%of the total rainfall events;the rainfall pattern of C occurred *** them,pattern A was the main rainfall pattern leading to soil and water loss and had the largest contribution rate to soil erosion in the *** 2005 to 2020,the area of rocky desertification showed a decreasing trend,accounting for 72.2%from 87.9%.Spatially,rocky desertification has mainly concentrated in the middle south of the watershed since 2010,while the rocky desertification mainly concentrated in the middle and north before *** effects of different grades of rocky desertification on soil erosion were different,and the soil erosion modulus in areas with the medium,severe and extremely severe rocky desertification was generally *** soil erosion modulus estimated by the RUSLE(Revised Universal soil Loss Equation)model was still much higher than that calculated by the data measured by the hydrological monitoring ***,the application of the RUSLE model in karst area needs to be further *** results can provide reference for rocky desertification control,soil erosio

关键词： Erosive rainfall Rocky desertification Spatial-temporal evolution soil erosion Karst

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