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2008 Vol.6 No.4
Published 2008-08-31
Articles
1
TUN Bin-； Gao-Jia-Rong-； Gan-Jing-； Li-Jin-Hai
Situation and countermeasures of debris flow disaster in Beijing Mountainous area
On the basis of the investigation of debris flow in Beijing Mountainous area in 1998,the 24 typical debris flow gullies in Mentougou,Fangshan,Yanqing,Changping,Miyun,Huairou,and Pinggu districts were investigated in 2006 to understand the new situation of social and economic development in debris flow danger zones.It was expected to offer scientific decision basis for the government to make scientific debris flow prevention system,to develop and construct the mountain area rationally,and hold the 2008 Olympics in Beijing smoothly.The investigation results show that: the potential debris flow disaster is serious in Beijing. The local residents don't have enough preventing awareness to debris flow.And the excessive economic exploitation and non-scientific village planning enlarge the probability of debris flow occurrence.Eight suggestions to the government about preventing debris flow in Beijing Mountainous area were put forward.
2008 Vol. 6 (4): 1-6 [
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GUO Ta-Long-； Wang-Quan-Jiu-； Wang-Li-； Fan-Jun
Relationship between hydraulic characteristics and soil erosion amount on loess slope
The relationship between hydraulic characteristics and soil erosion amount has been studied through rainfall simulator experiment on loess slope.The results showed that the average flow velocity and the Reynolds number increased as the scouring discharge increased,the Froude number decreased as the scouring discharge increased.At the same time,the overland flow changes from laminar flow to turbulent flow.When the discharge ranges from 10.1 L/min to 19.9 L/min the overland flow became to the muddy flow.The average flow velocity at the outlet increased as the sourcing discharge increased.The relation between the average flow velocity and the scouring discharge presented a power function.The unit sediment yield increased as Reynolds number increased.The relation between the unit sediment yield and the Reynolds number presented also a power function.The relationship between the unit sediment yield and the Reynolds number was determined by the range of the Reynolds number.As the Reynolds number closed to the critical Reynolds number(500),the unit sediment yield decreased linearly with the Reynolds number.This study revealed not only the mechanism of erosion on loess slope,but also was very important in ecological environment management of the Loess Plateau.
2008 Vol. 6 (4): 7-11 [
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WANG Rui-Fang-； Qin-Bai-Shun-； Huang-Cheng-Zhi-； Zhang-Hu-Lin-； Chang-Dan-Dong-； Dong-Yu-Ting-； Diao-Li-Yi
Characteristics of typical rainstorm,flood and sediment yield in Luoyugou Watershed
Based on the observed hydrology and sediment data and the flood investigation data in Luoyugou Watershed,the storm-flood-sediment characteristics of several typical torrential rainstorms causing extremely erosion were comprehensively analyzed.The results show that the deviation coefficient values of the area rainfall of the typical torrential rainstorms is 0.15-0.74,and the coefficient of nonuniformity is 0.37-0.90,and the ratio coefficient values of the extreme rainfall is 1.3-188.8.The maximum 10 min,30 min and,60 min precipitation in the heavy rain center area accounted for 19%-29%,35%-73%,and 60%-100% of the total rainfall;The flood volume of single storm accounted for more than 30% of the annual runoff,the runoff coefficient is 0.20-0.49,the modulus of maximum flood discharge is 4.07-9.34 m<sup>3</sup>/(s·km<sup>2</sup>),the total duration of flood is 6-96 h,the duration of rise is 15-80 min,the sediment discharge of single flood accounted for 60% of the annual sediment discharge,the sediment transport modulus of single flood is 7.1-14.0 thousands m<sup>3</sup>/km<sup>2</sup>,the maximum sediment concentration reache 774 kg/m<sup>3</sup>,the sediment peak is often 10-20 min ahead of the flood peak.The regression of the sediment hydrograph obviously lag behind in the flood hydrograph,the runoff with maximum sediment concentration is 40%-60% less than the maximum runoff.According to the contrast analysis,the difference of the storm-flood-sediment characteristics is mainly controlled by the temporal and spatial distribution characteristic of the torrential rain and the underlying surfaces conditions,and the effect of flood retention and sediment reduction of the soil and water conservation measures is obvious.
2008 Vol. 6 (4): 12-17 [
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XU Gao-； Zhang-Xiao-Ping-； Li-Dui
Periodic variation of the streamflow and sediment transport in Yan River using wavelet analysis test
The periodic variation and its changing features of the streamflow and sediment transport in Yan River were studied using wavelet analysis test.The monthly data of streamflow,sediment transport from 1953 to 2000 and monthly precipitation from 1957 to 2000 were employed for Ganguyi hydrological gauging station.The results showed that precipitation,streamflow,and sediment transport had significant periodicity and their sizes were approximate.They were 3,6.5,13,and 23 years.The main period for precipitation was 3 years due to the most significant variation coefficient.For both streamflow and sediment transport,it was 23 years.On the micro scale corresponding to the period of 3 years,the annual distribution of precipitation after 1970's became uniform over the time.The three curves of the precipitation,streamflow and sediment transport became turbulent from 1970's to the beginning of the 1980's probably due to the soil and water conservation measures increased dramatically in this period.The three curves returned consistent probably due to the damage and weakening of the conservation measures after 1980's.For both the middle scale with 13 years and the macro scale with 23 years,the curves of streamflow and sediment transport turned out to be out phase,or lagged the precipitation curve in some periods.Their periodicity showed that precipitation was the main outer deriving factor for Yan River producing streamflow and sediment,however the human activities were the another important factor to influence their period changing.
2008 Vol. 6 (4): 18-22 [
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YUAN Feng-Fei-； Ding-Guo-Dong-； Wang-Wei-Wei-； Wang-Xiang-Yu-； Dan-Hui-Shu
Characteristics of rainwater infiltration and evaporation in Mu Us Sandland
By indoor and field simulated experiments of infiltration and evaporation of the rainwater,the paper studies the depth and velocity of infiltration and the daily evaporation.The result indicates that the effects of different rainfall amount on depth and velocity of infiltration are significant.The preserved time of rainwater in the sand soil is different.It spends 4,6,11,15 d to evaporate rainwater of 1,2,5,10 mm.Apart from some evaporated,a part of the 15 mm rainwater is kept in the sand soil because of a dry layer of sandland.Due to the great difference of vertical distribution of the various plant roots,the more rainfall and the deeper the infiltration,the more rainwater can be used by deep-rooted plants in a longer period.
2008 Vol. 6 (4): 23-27 [
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28
LI Hu-； Chen-Dong-Hua-； Ci-Long-Jun-； Li-Zhi-Zhong
Time and space distribution changes of land desertification in Aibinur Lake region of Xinjiang
The Aibinur lake region had great position for its ecology and geography.The land desertification in Aibinur lake region was monitored and analyzed based on the RS and GIS with the satellite data.The results showed that the desertification by wind-erosion and saltation have absolute superiority in Aibinur Lake region.According to the analysis of the data in 2000,the area of desertification by wind-erosion occupies 32.35%,the area of desertification by saltation occupies 54.49%,the area of composite desertification occupies 12.68%,and water erosion desertification occupies 0.48%.From 2000 to 2005,the desertification area has reduced 4.5%,the area of desertification by saltation has reduced 2.85%,the area of wind-erosion reduced 41.58%,but the area of composite desertification has increased 82.9%.The degree of desertification tended to heavy in the whole.The time and space distribution changes in Aibinur lake region are that wind-erosion area and saltation area have reduced,the composite desertification area has increased.
2008 Vol. 6 (4): 28-32 [
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WANG Die-Gao-； Wang-Pan-Hui-； Xie-Shuang-Chi-； Mo-Fei-； Xu-Peng-Chao-； Xiong-Wei-； Shi-Zhong-Jie
Spatial variation of soil hydrologic-physical properties within the small watershed of Fenshuilinggou in Liupan Mountains,Northwest China
The spatial variation of soil physical properties within a small watershed is influenced by the environmental factors such as landform and vegetation,especially strongly influenced by the landform.The data analysis of soil physical properties collected from 118 sample sites in the small watershed of Fenshuilinggou in the Liupan Mountains of northwest China shows: 1) The soil bulk density and volumetric content of rock fragment increase with soil depth,while the saturation water content,capillary water content,total porosity,capillary porosity and non-capillary porosity decrease with soil depth;2) There is a big difference of soil physical properties among vegetation types.Within the 7 types of forest vegetation investigated(forest of <i>Pinus armandii</i>,forest of <i>Larix principis-rupprechtii</i>,forest of <i>Betula platyphlla</i>,forest of <i>Quercus liaotungensi</i>,mixed forest of <i>Pinus armandii</i> and <i>Betula albo-sinensis</i>,mixed forest of <i>Tilia paucicostata</i> and <i>Quercus liaotungensis</i>,mixed bushes),the soil bulk density in layer 0-20 cm and 0-60 cm is lowest for the conifer-broadleaf mixed forest of <i>Pinus armandii</i> and <i>Betula albo-sinensis</i>,highest for the mixed bushes,and in the middle for the pure conifer forests and broadleaf forests.Correspondingly,the soil water carrying capacity of soil layer 0-60 cm is largest in the conifer-broadleaf mixed forest,lowest in the bushes,and in the middle for those pure conifer or broadleaf forests.3) There is a difference of soil physical properties among slope aspects.All the soil physical properties investigated for the layer of 0-60 cm are basically better in north slope,bad in south slope,and in the middle for the west and east slopes.4) The slope position also has an effect on soil physical properties,taking the soil bulk density of soil layer of 0-20 cm as an example,it is highest at slope top and slope foot with the same value of 0.93 g/cm<sup>3</sup>.In general,the soil physical properties on the slope are better than those at the slope top and slope foot.5) There is a marked correlation between the soil physical properties and landform characters(relative elevation,slope aspect,slope position,and slope gradient),and a linear regression equations between them were established.
2008 Vol. 6 (4): 33-40 [
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41
WANG Feng-Cheng-； Xiao-Wen-Fa-； Zhang-Shou-Gong-； Shi-Yu-Hu-； Bo-Lei-； Ceng-Li-Xiong-； Mo-Rui
Amount and water holding capacity of forest litter in Three Gorges Reservoir area
Based on the data of forest resource inventory,combining with the survey of forest litter amount and experiment of litter immersed,a series of forecast models were established and the amount and water holding characteristics of litter in some vegetation types in Three Gorges Reservoir area were studied.The results showed that: 1) Significant difference was found for the storage of litter in some different forest vegetations.The highest storage of litter was observed in <i>Cunninghamia lancedata</i> forests(11.610 t/hm<sup>2</sup>),in <i>Cupressus funebris</i> forests was the lowest(3.948 t/hm<sup>2</sup>).2) The highest water content of litter was found in bamboo forests(182.9%),the lowest of water content of litter was observed in <i>Cupressus funebris</i> forest(32.2%).3) The water capacity increased with immersing time of litter,and decreased rapidly soon after 2-4 h in all vegetation types.Forest litter was saturated after 48 h of immersing.The highest water effective interception capacity of the litter was found in bamboo forests litter,which was 3.367 times higher than the litter weight,the lowest was that of shrubbery(just 2.089 times).4) The absorption rates of litter were high in initial 2 h,but significant difference was observed among different types.Then decreased sharply,and no longer absorbing water after 48 h.5) Based on the GIS data of forest vegetation and the established models,the litter amount,the potential water-holding capacity and the existing water-holding capacity to saturation of forest litter during single precipitation were calculated in Three Gorges Reservoir area.The values of these parameters were 20.485 7 million t,46.953 4 million t,32.917 5 million t in forest vegetation,respectively.The spatial distribution of potential water-holding capacity and existing water-holding capacity to saturation of litter showed a pattern of high values in southeast area and low values in northwest area.This results provided a basis for scientific evaluating the function of water conservation and for the planning and construction of forest ecological engineering in Three Gorges Reservoir area.
2008 Vol. 6 (4): 41-47 [
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48
LIU Xin-； Man-Xiu-Ling
Distribution patterns of root systems of Populus simonii Carr. in highland of Mu Us Sandland
In order to explaining adaptability of root systems of Populus simonii Carr.,we had chosen the Populus simonii Carr.artificial plantation in highland in northeast of Mu Us Sandland to study distribution patterns of it's root systems using root auger.The results indicate that: root systems of Populus simonii Carr.has mostly distributed in the depth of 0-40 cm soil,and reached peak value in the surface layer of 0-20 cm depth.The vertical distribution patterns of fine root(D<3 mm) in different slope position and different distance to trunk are similar,and the difference of vertical distribution patterns of thick root(D>3 mm) is conspicuous,but it's density on top of slope is greater than bottom of slope in 1.0 m and 1.5 m distance to trunk.The density of fine root and thick root in bottom of slope are decrease to follow to increase in distance to trunk,however,the density of fine root in top of slope is similar with the former,and that of thick root reached peak value in 1.0 m distance to trunk.The fine root proportion is greater than thick root in the deep soil layer of any distance to trunk,but the thick root proportion in the deep soil layer on top of slope is greater than bottom of slope.It is showed that root systems of Populus simonii Carr.had favorable adaptability for different slope position.
2008 Vol. 6 (4): 48-53 [
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XUE Zhi-De-； Zhang-Gan-Gong-； Shu-Qing-Ke-； Chen-Wei-Beng
Relative light intensity and soil water content in different gaps of shrubbery caused by human disturbances
In order to determine effective gap manner and intensity,effects of relative light intensity and soil water content,the artificial gaps of 2 kinds were studied.The results indicated that daily relative light intensity in leafing and shooting date at fish scale pit surface in closed shrub stand was 44.54%,but less than 10% in growth season;the values in strip-shaped gap were 76.38%,71.92% and 65.70% in the middle of Apr.,in late June and in late Oct.,respectively. The relative light intensity were more than 80% in the early morning(08:00—11:00),and less than 50% in strong sunny hours(13:00—15:00) in growth season,specially.That is advantageous to photosynthesis and avoiding from sunstroke for seeding.The soil water content in strip-shaped gap was more than anyone in shrub in growth season.The strip-shaped gap is efficient to regulating relative light intensity and raising soil water content.
2008 Vol. 6 (4): 54-58 [
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59
WANG Lin-Lin-； Chen-Li-Xin-； Liu-Zhen-Hua-； Jiao-Lu
Relationship between soil fertility and tree growth in the broad-leaved <i>Pinus korariensis</i> forest at different growth periods
Soil fertility,tree growth of main stands,and their relationship are studied.The results show that with the succession of progress,tree height,breast high diameter of <i>Pinus korariensis</i>,spruce,fir increased sustainablely,volume of birch and other broad-leaved species decreased;Soil permeability,capillary porosity,non-capillary porosity increased,pH of surface layer(0-10 cm) decreased gradually,organic matter,N,NO3-N,NH4-N increased.For broad-leaved <i>Pinus korariensis</i> forest of different successional stages,the correlation between the average tree height,average breast high diameter and the soil bulk density,soil pH was negative.Capillary porosity and N have little relevance with the average tree height and the average breast high diameter of trees.Using the principal components analysis,we found that the water saturated capacity of soil,capillary porosity,content of organic matter and NO3-N are the mostly factors affecting on the growth of tree and soil fertility at the different growth period.The descending order of soil fertility of different growth periods is: top community,stabilization phase,development stage,and formation stage.The fertility of soil is going on the track of sound progress.
2008 Vol. 6 (4): 59-65 [
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JUE Zhi-Jiang-； Zhang-Chi-； Ding-Guo-Dong-； Yang-Wen-Bin-； Guo-Jian-Yang-； Diao-Ming-Pan
Effect of single shrub on wind erosion in Mu Us Sandland
Artemisia sphaerocephala、Caragana intermedia、Hedysarum fruticosum var.mongolicum are common plants in Mu Us Sandland,and are main species for preventing soil wind-erosion.This paper takes the single shrub of these species as research subjects,and the wind velocity and sediment delivery around them was measured,and their wind flow field based on aerodynamics principle was analyzed,It is concluded: 1) before the leaf-expansion period in spring,the protective effect of Artemisia sphaerocephala is superior and its protection distance is biggest one among three single shrub with similar cross section.2) The unreasonable disposition structure can cause the channeling effect in the current flow field between shrubs,and aggravate wind erosion.In order to improve the protective effect in the future,the plant disposition must be rational.
2008 Vol. 6 (4): 66-70 [
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KANG Wen-Xing-； Tian-Da-Lun-； Diao-Zhong-Hui-； Shu-Fan-； Wang-Guang-Jun
Effect of hydrological process on the productivity of <i>Cunninghamia lanceolata</i>(Lamb.) Hook.plantation
Hydrological data were measured during two years(from 2004 to 2005) within <i>Cunninghamia lanceolata</i>(Lamb.) Hook.plantation at Huitong Ecosystem Research Station of Central South University of Forestry and Technology in Hunan Province,Southern China,then change of stand productivity were analyzed.Atmosphere precipitation has provided moisture content needed by <i>Cunninghamia lanceolata</i>(Lamb.) Hook.growth not only,and the precipitation leached from the tree leaves and stems to bring nutrient into the stand.Precipitation was one source for the water and nutrient of <i>Cunninghamia lanceolata</i>(Lamb.) Hook.plantation in catchments.Trees grows though seasonal variation accepting self rhythm effect,however,monthly rainfall determined water and nutrient supply to the stand in growing seasons,then effected the stand productivity.Growing ratio of <i>Cunninghamia lanceolata</i>(Lamb.) Hook.plantation were matched with soil moisture.The transpiration from forest trees related with the photosynthesis in some degree,however,it was not said that transpiration loss of water could indicate the photosynthesis intensity in the stand,because it was controlled by trees physiology.In a forest ecosystem,transpiration lost water but preserved the nutrient,however,runoff lost both of them,it was that the water output from the ecosystem effected the stand productivity.
2008 Vol. 6 (4): 71-76 [
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JIAO Ju-Yang-； Gu-Yan-Feng-； Jing-Ge-； Wang-Mo-Zhong
Natural soil erosion,soil loss tolerance and criterion of soil and water conservation
Based on the summarizing of domestic researches on natural soil erosion amount and soil loss tolerance,the relationship between them and the criterion of soil and water conservation were discussed.There are 3 reference values for ascertaining the criterion of soil and water conservation: 1)standard value,i.e.soil loss tolerance,it is the goal that soil and water conservation at least need to achieve,and it is dissimilar with the function demand and enforceable optimal control measures of different land use,along with the risk of soil erosion and restriction for soil and water conservation in different regions;2)ideal value,i.e.the soil loss amount in well-balanced natural condition;3)extreme value,i.e.no loss of soil and water.The soil and water loss should be firstly controlled within the range corresponding to the ecological environment and social economy of the time,then gradually down to natural soil erosion,or even to no of loss of soil and water loss;the idea of environment ethnics,environment esthetics,and landscape design also should be introduced in the implementation of soil and water conservation,to ultimately actualizing the sustainable land use,healthy and stable regional ecosystem,and harmonious human-nature development.
2008 Vol. 6 (4): 77-84 [
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LIN Yong-Xian
Comprehensive management and water source protection in the clean small watershed at Hongqi Reservoir in Dongshan County
Based on geographical and socio-economic characteristics of the clean small watershed at Hongqi Reservoir in Dongshan County,the outstanding contradictions between population and resources was analyzed,and the main problems of the ecological environment around Hongqi reservoir was discussed deeply.The ideas of and measure system of the clean small watershed management was put forward.
2008 Vol. 6 (4): 85-88 [
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CHEN Wei-Jie
Research on the construction of the system of surface runoff gathering project in western mountain areas of Henan Province
Based on the investigation of the project which aims at developing the soil and water conservation and the effective use of rainwater in the rocky mountain area and the loess area in Henan Province,a measures system was put forward,which includes bench terrace,sloping bench terrace,the water cellar,check dams,and the water storage dams.
2008 Vol. 6 (4): 89-93 [
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DIAO Ke-Rong-； Chen-Li-Hua-； Xiao-Xiang
Measure system of runoff control in Loess Region
The development of economy and society was restricted severely by the drought,soil erosion and water loss in Dingxi City of Gansu Province.So the key problem is how to use water resource and prevent soil and water loss efficiently.Based on the theory of runoff control,this paper presented the measure system of runoff control,which was used in the Jiuhuagou catchment of Anding district of Dingxi city.The results show that water resource was utilized efficiently and soil and water loss was also controlled effectively,the regional economy was developed persistently through runoff control in the periods of five years.Percentage of vegetation coverage and land use increased from 24% to 57.1% and from 63% to 81.7%,respectively.Soil erosion modulus decreased from 5 400 to 915 t/(km<sup>2</sup>·a)and conservation degree of catchment increased from 44.9% to 86.3%.Total income of watershed and average net income of per farmer raised from 5.02 million yuan to 14.05 million yuan and from 757 yuan to 1 486 yuan,respectively.Crop yield per person increased from 427 to 654 kg.Contribution percentage of science and technology with measures of runoff control was 56.71% on the total increment of total agriculture production value.Measures of runoff control played the key effect to getting rid of poverty and becoming rich for farmer in the catchment.
2008 Vol. 6 (4): 94-99 [
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ZHANG Chao-； Wang-Chi-Guo-； Wang-Xiu-Ru-； Han-Lei
Review and thoughts on the regionalization of soil and water conservation in China
Regionalization of soil and water conservation is an important and based work of soil and water conservation work.In this paper,initiating with the positioning,development history and current situation of the regionalization of the soil and water conservation,the existing problems of the regionalization of the soil and water conservation in China was analyzed,the characteristics,principles,principles of index setting,methods of the regionalization of soil and water conservation were discussed,and the framework of the regionalization of soil and water conservation in China was presented preliminarily.
2008 Vol. 6 (4): 100-104 [
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BI Hua-Xin-； Tu-Xin-Xiao
Teaching reform and practice in the course of Soil and Water Conservation
As the problem of soil erosion and desertification becoming more and more seriously in China,there are a lot of universities and/or colleges have been taking Soil and Water Conservation as a professional course for the specialties which related with soil and water conservation and desertification combating,such as Environment,Resource,Geology,Agronomy,etc.Facing lack of the basic knowledge that related to soil and water conservation for students whose specialties are connected with soil and water conservation,it is a big challenge for teaching this course within such few teaching hours but so many contents of course.This paper gives only some primary suggestions on the teaching methods and contents of course arrangement based on author's teaching experiences in recent years.The teaching practices of this course showed that the teaching reform and practices in this course are successful.
2008 Vol. 6 (4): 105-108 [
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WANG Ji-Jun
Safety evaluation of the agricultural eco-economics of Zhifanggou watershed in the Hilly-gully region of Loess Plateau
Based on the developing process of agricultural eco-economic system of Zhifanggou watershed nearly 70 years,and the evaluation index system which was suggested in national ninth five years subject,the situation of the agricultural eco-economics snfety in mark years of different development stage of Zhifanggou watershed was evaluatied.It was concluded that,the agricultural eco-economic system had been the situation of sub-safety in 1938,2000,2005,extreme unsafe in 1958,1975,and unsafe in 1985,1990,1995.Through the analysis of driving force for the change of agricultural eco-economics safety,it may be forecasted that the developing trend of the agricultural eco-economics safety,and some proposals to achieve agricultural eco-economics safety,focusing on the cultivation of leading industry,improving circular chain of the system,and adjusting industry structure,achieving the effective and sustain able use of agricultural resource were suggested.
2008 Vol. 6 (4): 109-113 [
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SUN Zhong-Feng-； Ca-Jian-Qi-； Chang-Zhen
Health assessment of eco-economic system of Hui County in Ganshu Province
The healthy situation of a regional ecosystem is decided by multiple ingredients.Though evaluating the health of eco-economic system of Hui County,the decision will be supplied for eco-environment conservation plan.In this paper,the health degree was evaluated based on eco-system,socioeconomic system,human health and policy.Eco-environment,natural resource,socioeconomic system,and sustainability were chosen as the base of assessment system.The Eco-environment included coverage of forest,soil and water losses,index of water-environment, erosion modulus,depth of surface runoff and slope of farmland.Natural resource included water quantity per capita,farmland per capita,woodland per capita,net primary productivity(NPP),soil organic matter content,meadow area of animal unit.Socioeconomic system included population density,urbanization rate,gross national product per capita,income per capita,Engel coefficient.Human health and policy included energy of consumption per capita,water usage quantity per capita,scientific persons in per ten thousand person,occupation ratio of third industry,eco-environment promotion,eco-environment management,satisfaction degree of public to environment,input of eco-management,reach standard degree of industrial waste disposal,usage degree of industrial solid waste matter, disposal degree of industrial discharge gas and input of education.The author created 29 indicators for quantitative expression and assessed the health of ecological environment in three areas by method of AHP(Analytic Hierarchy Process) and entropy production.The results show that the eco-economic system of three areas in Hui County is in status of health or inferior health.Some problems are occurred in sustainability of Ⅰarea and Ⅱ area.
2008 Vol. 6 (4): 114-120 [
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RAO Liang-Yi-； Cui-Jian-Guo
Research advances on the eco-hydrological functions of riparian buffer
As the key component of the riparian ecosystem,the riparian buffer zone plays an important role in the ecohyrological process,which has been taken a key measures in riparian ecosystem management by many countries,especially as the Best Management Practices(BMPs) in non-point pollution control for agricultural watershed in some developed countries.The eco-hyrological functions of riparian buffer zone focus on aspects such as bank erosion control,sediment and nutrients retention,water quality protection,water temperature regulation,wildlife habitat,stream biodiversity and ecosystem integrity maintainence as well as the riparian landscape quality improvement.This paper reviews the advances in the research on the eco-hyrological functions of riparian buffer zone,and summaries the width of riparian buffer for various ecological functions requirement,which will be determined by many factors such as protection goals,soil,topography,vegetation and drainage of study site.
2008 Vol. 6 (4): 121-128 [
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