中国水土保持科学
Home
About Journal
Editorial
Publication Ethics
Instruction
Subscription
Contact Us
中文
Editorial 1
Editorial 2
Editorial 3
Editorial 4
For Author
Scope for Articles
Writing Format
中国水土保持科学
Paper Search
Adv Search
2013 Vol.11 No.2
Published 2013-04-30
Articles
1
Liu Zhen
Soil and water conservation survey in China and its application
The first national survey for water and meanwhile for soil erosion was conducted during the period of 2010 -2012. The adopted survey methodology, acquired data, organizing mode were harmonized unprecedently in this national soil erosion survey. Through this survey, the soil erosion area,distribution and intensity were clarified at the national scale. Furthermore, the quantity, distribution area of the eroded gullies in the northwest Loess Plateau and northeast black earth regions were also quantified for the first time, as well as the implemented type, quantity and distribution of the respective prevention measures. These survey results objectively reflected the national status of soil and water losses and the effects of long term protecting efforts, moreover, provided a scientific basis for decision—making for national ecological construction, and soil and water conservation as well. It is recommended that the next steps would be to strengthen the soil and water conservation course, especially focusing on specific regions, to advance the ecological restoration at larger scale, to intensify the comprehensive treatment of sloping croplands and eroding gullies, to initiate ecologically clean watershed projects and to reinforce the information construction of soil and water conservation.
2013 Vol. 11 (2): 1-5 [
Abstract
] (
745
) [
HTML
1KB] [
PDF
758KB] (
1278
)
6
Liu Jianxiang, Li Zhiguang, Zhang Xiaoping, Li Rui, Xu Xiaohong, Zhou Hongwen
Spatio-temporal variation characteristics of the rainfall erosivity in He-Long region during last 30 years
To evaluate the rainfall erosivity quantificationally as accurate as possible, subsequently to estimate the potential capacity of rainfall-induced soil erosion, daily precipitation data was collected from 96 meteorological stations of every county in He-Long section of the middle reaches of Yellow River during 1981 -2010. Based on the rainfall erosivity model of half month, the spatio-temporal variations of rainfall erosivity at half month, month, season and year scale were analyzed. Results indicated that: 1) Rainfall erosivity at the second half of July, August, and summer were greatest at the corresponding time scales.Average annual rainfall erosivity increased from northwest to southeast at space. 2) Annual rainfall erosivity showed decreasing trend overall, and the area of rainfall erosivity reduced occupies 68.45% of the whole area. In addition, the rainfall erosivity reduced in the first half of July made the largest contribution to the decrease of the annual rainfall erosivity. 3) The increasing area of annual rainfall erosivity mainly located at the northwest and southeast of the He-Long region, moreover, rainfall erosivity in the first half of July showing increasing trend only covered 1.12% of the total area.
2013 Vol. 11 (2): 6-13 [
Abstract
] (
692
) [
HTML
1KB] [
PDF
1956KB] (
1015
)
14
Sun Bei, Mao Lili, Zhao Jun, Lei Tingwu
Effects of flow rate on soil infiltrability measurement with the automatic system
Soil infiltrability is of great importance for such researches and applications as hydrological processes and agriculture and forestry industries and etc. In the laboratory experiments the automatic soil infiltrability measurement system was applied to study the effect of the flow rate on the measured soil infiltrability so as to test measurement method and the instrument system and their responses to flow rates.The experiments involved three inflow rates (0.75, 1.02, and 1.92 L/ h) with 3 replicates. The measurement system, as controlled by a computer, automatically recorded the advancing processes (increase) of the wetted soil surface area, and then it was used to estimate the soil infiltrabilities with the numerical method and the average approximation methods. The results indicated that the system is convenient to use and the computational procedures are simple. There were no significant differences among the measured infiltration processes. The infiltrability processes measured under different flow rates equally represent the whole infiltration processes of the soil. This study supplies a reference for the range of used flow rates for infiltrability measurement. The system is demonstrated to be useful for further understanding of the soil infiltration process.
2013 Vol. 11 (2): 14-18 [
Abstract
] (
751
) [
HTML
1KB] [
PDF
1175KB] (
1019
)
19
Cheng Jing, Wu Faqi, Wang Jian, Yun Feng, Wu Guangyan, Yu Xiaoling
Effects of soil erosion of different degrees on soil productivity and recovery in Weibei Dryland
Soil erosion could reduce productivity and affect crop yields. Therefore, the recovery of soil productivity becomes a widespread problem concerned by people. Productivity of eroded soils was studied through artificial simulation of soil erosion and recovery of soil productivity was explored by fertilization.The results showed that: 1) Fertilization could improve the physical properties such as reducing moisture content of eroded soil, increasing bulk density, and decreasing the porosity. 2) Soil organic matter and other mass nutrient contents decreased with the increasing degree of erosion under no-fertilization conditions. Fertilization could increase soil organic matter and mass contents of soil nutrients. However,soil organic matter and mass nutrients also presented a trend of decreasing with soil erosion increasing after fertilization. 3) Soil erosion could affect the Zea mays L. biomass, which declined by 0.38% with 1cm depth erosion. But, fertilization could compensate this losses caused by erosion. 4) Similar with the variation trend of Zea mays L. biomass, yields of Zea mays L. decreased with the increasing degree of soil erosion. Zea mays L. yields declined an average of 2.49% with 1cm depth erosion losses. Under four different soil surface treatments, i. e. , 20 cm surface peeled, 10cm surface peeled, original topsoil undisturbed and 10cm surface covered, Zea mays L. yields increased by 2.44%, 2.13%, 1.50%,1.23% with conventional fertilization and 2.99%, 2.56%, 1.98%, 1.14% with excessive fertilization compared with no-fertilization conditions respectively.
2013 Vol. 11 (2): 19-24 [
Abstract
] (
671
) [
HTML
1KB] [
PDF
780KB] (
865
)
25
Guo Deliang, Hu Wei, Fan Jun, Wang Li
Spatial variability of surface soil moisture under different landscape units in the Heihe Oasis
By using statistical and geostatistical methods, spatial structure characteristics of surface soil moisture were studied, including gobi, woodland and agricultural land in the oasis area of the midstream of the Heihe River between August and October. The results showed that: 1) soil moisture of the three landscapes units decreased from August to October and represented moderate variation. The relative variation (the coefficient of variation) of soil water was smaller under dry soil condition and the absolute variation (the standard deviation) of soil water was higher under wet soil condition; 2) the soil surface moisture of the three landscape units had obvious spatial structure and seasonal variations, which represented patch shape distributions. The optimal fitting was achieved using the exponential model. The variation tendency of sill, range and water content was similar and there was a moderate and strong relationship between soil moisture and spatial correlation. The spatial autocorrelation in October was significantly greater than that in August and September; 3) Land use,mean soil water moisture, soils,landform, climate and human activities were the major factors leading to obvious time and space differences of surface soil moisture in the study area. Further study indicated that average soil water content had longer effects.
2013 Vol. 11 (2): 25-32 [
Abstract
] (
705
) [
HTML
1KB] [
PDF
1604KB] (
1019
)
33
Bl Caixia, Mu Xinmin, Zhao Gangju, Bai Hua
Effects of climate change and human activity on streamflow in the Wei River Basin
Research was conducted in a tributary of the Yellow River, Wei River. Streamflow at Huaxian station during the period of 1958 -2011 were applied to identify the trends and abrupt changes by using Mann-Kendall test, non-parametric Pettitt test and double mass curve analysis in the Wei River basin.The simple water balance model was employed to quantify the effects of climate variability and human activities on streamflow. Results show that 1) a remarkable decrease trend in annual streamflow were detected with the rate of 0.86 mm/ a. 2) an abrupt change was identified in 1994. The streamflow time series were then divided into two periods, i. e. , the baseline period (1958 - 1994) and the changed period (1995 - 2011). 3) Streamflow during the changed period decreased by 64.6%, 41.3% and 45.5% in dry year, normal year and wet year, respectively. 4) In the controlled region of Huaxian station, it was found that precipitation variability and human activities accounted for about 49.0% and 51.0% of the change in streamflow. Additionally, the effect of climate change on streamflow was mostlycaused by precipitation decrease in the Wei River basin.
2013 Vol. 11 (2): 33-38 [
Abstract
] (
804
) [
HTML
1KB] [
PDF
1064KB] (
1341
)
39
Feng Huimin, Wang Dianlong, Hu Zhenhua
Soil erosion and water loss laws of mine waste slope
Based on runoff scouring experiment, the laws of soil erosion and water loss of mine waste slope were studied. The results showed that:1)In the designed runoff of 2.0 and 2.5 L/ min, the runoff process occurred single peak or several peaks curve with no obvious laws. When the designed runoff increased to 3.0 and 3.5 L/ min, the runoff process performed almost single peak curve, and the peak value appeared earlier with similar laws. 2)The average runoff amount increased rapidly with the increase of designed runoff and the land slope, and the tendency agreed to power equation. The designed runoff played bigger effects on the average runoff than land slope. 3) The average watershed sediment yield increased rapidly with the increase of designed runoff and the land slope, the tendency agreed to power relationship, and the effects of designed runoff on the average watershed sediment yield was greater than that of land slope.
2013 Vol. 11 (2): 39-44 [
Abstract
] (
679
) [
HTML
1KB] [
PDF
836KB] (
930
)
45
Yan Haowen, Liu Yanping, Cao Jianjun
Analysis and prediction of the underground water depth and its influencing factors in Minqin Oasis
Water plays a key rule in environmental protection and economic development in Minqin Oasis. Hence, it is significant to analyze and predict the factors that affect the underground water of the Oasis. This paper firstly calculates the factors that closely correlated to the depth of underground water;then it obtains the quantitative relations between each factor and the depth of underground water by the Principal Component Analysis and Regression Methods. Finally, it predicts the future tendency of these factors. The conclusions of this research are: population, grain yield, runoff water, GDP, quantity of evaporation and the number of large livestock are closely correlated to the depth of underground water;the increase of population and the quantity of evaporation lead to the downward of the underground water,and the former has much greater effect than that of the latter; and the population and the grain yield will increase while the quantity of runoff water and the depth of underground water will decrease in the coming six years.
2013 Vol. 11 (2): 45-50 [
Abstract
] (
868
) [
HTML
1KB] [
PDF
785KB] (
1026
)
51
Xu Hongyu, Wang Yingyu, Song Guilong, Han Liebao
Characteristics of root system distribution of common plants on freeway slopes in earthy-rocky mountain area of North China
A study was conducted on the distribution characteristics of common plants on Jingcheng freeway (The third period), by using the methods of digging out whole root system. Results showed that:1) the total root length and biomass of woody-plants were larger than that of herbaceous-plants. 2)The ratio of root length to biomass of woody-plants reduced gradually with the soil depth, vice verse in herbaceous-plants. Roots of Festuca arundinacea distributed within the scope of 10 cm topsoil. 3) Total length of these plants was Lespedeza bicolor Turcz. > Robinia pseudoacacia L. > Amorpha fruticosa L.and Festuca arundinacea > Astragalus adsurgens Pall. > Medicago sativa L. . For woody-plants, Robinia pseudoacacia L. and Amorpha fruticosa L. had the largest proportion of thick roots and Lespedeza bicolor Turcz. had the largest proportion of thin roots. For herbaceous-plants, Astragalus adsurgens Pall. and Medicago sativa L. had the largest proportion of thick roots, and Festuca arundinacea had the largest proportion of thin roots. 4) The angle of slope and taproots of Robinia pseudoacacia L. , Amorpha fruticosa L. , Medicago sativa L. and Astragalus adsurgens Pall. became smaller gradually as soil depth,and grew down along rock surface finally, or change growth direction when the taproots meeting hard stone, or enter intocrack. 5) The fibres-roots of Festuca arundinacea grew down along sticked stone, and the angle with slope was about 10 degree. Lespedeza bicolor Turcz. had no obvious taproots, therefore, its roots distributed shallow and grew along slope taken trunk as center.
2013 Vol. 11 (2): 51-58 [
Abstract
] (
814
) [
HTML
1KB] [
PDF
4075KB] (
1158
)
59
Geng Bing, Wang Huatian, Wang Yanping, Xue Baojian, LI Wenqiang
Comparative study of coppice and seeding forest of Robinia pseudoacacia L.
Robinia pseudoacacia L. is an important timber and non-commerical species. The representative plantations of initiation and sprouting second generation were selected in Mountain Yi(E 118°36’,N 36°10’) and Mountain Tai (E 117°19, N 36°17’) of Shandong Province. To solve the problems of sprouting regeneration embarrassment, plantation structure characteristics, plant growth process and trunk form were investigated and analyzed. Results showed that: 1) Trunk height before 22 years, trunk total volume growth and the average volume growth before 17 years, and volume growth in successive years before 14 years of sprouting second generation plantation were higher than that of initiation generation, but afterwards, all indexes are lower than initiation generation. 2) Trunks of the initiation generation plantation of R. pseudoacacia L. were straight, while most of the sprouting trunks were crooked. 3) The index of the trunk bending could be used to describe the truck bending degree.According to this index, five levels, i. e. , straight truck, mainly straight truck, slightly bending truck,medium bending truck, and seriously bending truck were divided. We found that in R. pseudoacacia L.plantation medium bending and seriously bending truck trees accounted for 34.8 percent, the straight truck tree was few which only accounted for 0.86 percent, the mainly straight truck trees accounted for 33.8 percent. Based on the study of growth retardation, bad trunk form and non-timber problems with regard to the R. pseudoacacia L. sprowting regeneration plantation, we suggested that sprouting regeneration was a very important problem which required much more attentions and researches.
2013 Vol. 11 (2): 59-64 [
Abstract
] (
829
) [
HTML
1KB] [
PDF
827KB] (
1287
)
65
Chen Zhicheng, Wang Zhiwei, Wang Rongrong, Yang Jihua, Geng Bing, ZHang Yongtao
Physiological response of three broadleaved tree species to drought stress and evaluation of drought resistance
The two years Acer mono Maxim. , Ailanthus altissima Swingl. and Pistacia chinensis Bunge's physiological parameters such as malondialdehyde (MDA), superoxide dismutase (SOD) activity, cell membrane permeability, leaf relative water content, chlorophyll, proline content, photosynthetic were measured by potting experiment. The physiological response of the three broadleaved tree species to soil drought stress was analyzed, and the drought resistance was evaluated by subordinate function. The results showed that: with the development of drought stress, the MDA, cell membrane permeability and proline content of the three tree species increased, while leaf relative water content and net photosynthetic rate decreased; Acer mono Maxim. and Ailanthus altissima Swingl. 's SOD activity rose at first, and then dropped, while Pistacia chinensis Bunge's SOD activity rose at first and then dropped, at last rose again;Acer mono Maxim. and Ailanthus altissima Swingl. 's chlorophyll content rose at first and then dropped,while Pistacia chinensis Bunge's chlorophyll content had no distinct variation between pretest and posttest. Ailanthus altissima Swingl. and Pistacia chinensis Bunge's water use efficiency of leaf dropped at first and then rose ,at last dropped again, while Acer mono Maxim. 's water use efficiency of leaf rose at first, and then dropped. The subordinate function was used to rank their drought tolerance, and the order was: Ailanthus altissima Swingl. > Pistacia chinensis Bunge > Acer mono Maxim. . We knewproline, SOD and leaf relative water content were the key indicators to evaluate the drought resistance of the three tree species by grey correlation analysis.
2013 Vol. 11 (2): 65-71 [
Abstract
] (
819
) [
HTML
1KB] [
PDF
842KB] (
829
)
72
Huang Haixia, ZHang Yuzhen
Growth suitability of Caragana korshinkii in Three Water Types afforested area in northern mountain of Lanzhou City
In order to find dominant site factors affecting growth of Caragana korshinkii and determine its suitable site type, growth indicators of C. korshinkii were investigated using sample plot method under different site conditions in Three Water Types afforested area in northern mountain of Lanzhou City,relationship between site factors and growth indicators were analyzed by correlation and regression analysis method and growth suitability was evaluated using fuzzy optimization decision method. The results showed that the elevation only had highly significantly negative correlation with the tree height; the elevation was significantly negatively correlated to the tree height base diameter and crown; the slope aspect was markedly negatively correlated to the tree height, branch number, and crown. Slope degree and slope aspect were the leading factors affecting growth of C. korshinkii. The optimum site type for C. korshinkii were the conditions with the altitude of 1 609 -1 658 m, shady and semi-shady mild slope and the more suitable type were the conditions with the altitude of 1 659 -1 708 m, shady and semi-shady mild slope and slope.
2013 Vol. 11 (2): 72-76 [
Abstract
] (
729
) [
HTML
1KB] [
PDF
775KB] (
894
)
77
An Junzhen, Cai Chongfa, Luo Jinxuan, Li Chaoxia, Gao Yayu
Damage on eco-environment and re-vegetation patterns of tailings in Shewushan Gold Mine
Serious damage on ecological environment happened due to gold mine exploiting. According to the theories of vegetation restoration and ecological reconstruction, we analyzed the damage in mining area and explored the best model of vegetation restoration and ecological reconstruction. The results showed that gold mine exploition caused the destruction of soil structure, the loss of soil nutrient, the enrichment of heavy metal, and the reduction of species diversity and the single structure of plant community. Based on the analysis of the limiting factor of environment and the existing model of vegetation recovery, we indicated that reasonable match of arbor, shrub and grass was very important,especially the shrub and grass. The best method of vegetation restoration should follow the order of pioneer plant, local grass, shrub and arbor. The results of this study would finally provide a theoretical reference for gold mine tailings vegetation recovery and similar ore slash ecological reconstruction.
2013 Vol. 11 (2): 77-83 [
Abstract
] (
825
) [
HTML
1KB] [
PDF
786KB] (
1247
)
84
Ding Chenxi, LI Yongqiang, Domg Zhi, YIN Ruobo, Wang Yamei, Shen Yunkuo
Effects of different land use modes on physical and chemical properties of saline-alkali soil in Yellow River Delta
The effects of different land use modes on physical and chemical properties of the saline-alkali soil in Yellow River delta were analyzed by field soil sampling and laboratory experiment. The results showed that:1)the organic matter and total nitrogen quality content in the profile of 0 -10 cm of Robina pseudoacacia forest land were the highest, 17.30 and 1.04 g/ kg respectively. The average soil density in 0 -20 cm (1.33 g/ cm3 ) and conductivity in 0 - 100 cm (290.25 μs/ cm) were less than those of Tamarisk chinensis Lour. forest land and Gossypium hirsutum L. land. The porosity (51.91%) and clay partical quality content (3.99%) in 0 -20 cm were higher than those of Tamarisk chinensis Lour. forest land and Gossypium hirsutum L. land. 2)The pH value was 6.77 in 0 - 100 cm of Tamarisk chinensis Lour. forest, significantly lower than that of Robina pseudoacacia forest land and Gossypium hirsutum L.land (P < 0.01). The available potassium quality content in 0 - 100 cm of Tamarisk chinensis Lour.forest land was the highest(104.47 mg/ kg), significantly higher than that of Gossypium hirsutum L. land (P <0.01). There was no significant difference between Tamarisk chinensis Lour. forest land and Robina pseudoacacia forest land. The average available phosphorus quality content in 0 -100 cm was Gossypium hirsutum L. land > Tamarisk chinensis Lour. forest land > Robina pseudoacacia forest land. 3) The physical and chemical properties of the artificial Robina pseudoacacia forest land were better than those of natural regenerating Tamarisk chinensis Lour. forest land and artificial cultivated Gossypium hirsutum L.land. The results could provide reference for the reasonable use and improvement saline-alkali land of Hekou County in Yellow River Delta.
2013 Vol. 11 (2): 84-89 [
Abstract
] (
876
) [
HTML
1KB] [
PDF
802KB] (
1065
)
90
Han Bo, ZHou Lili, Fan Haoming, Huang Donghao
Nitrogen pollution load simulation of the Puhe River Basin and the spatial and temporal distribution
At present, many countries face severe non-point source pollution, in which the load of nitrogen pollution is still the key issues of water resource and environmental governance. The load of nitrogen pollution and its spatial and temporal distribution were simulated and analyzed by using SWAT model with the topography, land use, climate condition and other factors, which will be great significant for non-point source pollution control. Based on basic data collection of Puhe River Basin of Shenyang City, Liaoning Province, simulation research databases was built by SWAT model coupled with GIS. The whole basin was divided into 23 sub-basins and 215 hydrological response units according to water type distribution of Puhe. Nitrogen forms, contribution ratio of nitrogen pollution load, critical nitrogen pollution areas and the nitrogen pollution distribution of spatial and temporal were simulated. Results showed that: 1) The nitrogen mainly exists by forms of organic nitrogen, NH+4 -N, NO-3 -N, NO-2 -N in water, in which that of NO-3 -N is maximum. 2) On the temporal scale, the content of TN fluctuated monthly, moreover, TN loss was hysteretic significantly. 3) At the spatial scales, organic nitrogen and NO-3 -N in the basin diffused from northeast to southwest direction. The nitrogen content of upstream and midstream was higher than the downstream region. In addition, No. 1 sub-basin is the key nitrogen pollution area in the basin, No. 3, 9 and 10 sub-basin are the secondary nitrogen pollution areas. The TNcontribution region mainly located at the area from basin outlet to the water of Majiawopeng.
2013 Vol. 11 (2): 90-96 [
Abstract
] (
742
) [
HTML
1KB] [
PDF
1284KB] (
966
)
97
ZHang Qingyin, Fan Jun, ZHang Xiaoping
Effect of Grain for Green on the landscape pattern of small watershed in the farming crisscross region:A case study in Liudaogou Watershed
Based on the remote sensing images, the impact of the Grain for Green project on the spatial-temporal variability of land use and landscape pattern in the recent 15 years in the farming crisscross region on the Loess Plateau were analyzed using RS, GIS technology and landscape ecological methods.The results showed that the landscape pattern changed little before Grain for Green (1995 -2002) with the small range of A (percentage of land area), IA (aggregation index) and landscape patterns. After Grain for Green (2002 - 2010), small watershed landscape pattern occurred a dramatic evolution with the sharp decrease of the percentage of arable land, rapid increase of the percentage of forest and grassland area and the decrease of plaque border complexity. From 1995 (before Grain for Green ) to 2010 (after Grain for Green), the contagion index increased from 46.26 to 47.54, and the landscape diversity index decreased from 1.67 to 1.65. The farmland, meadow and woodland matrix landscape ecosystem in 1995 changed into meadow and woodland matrix landscape ecosystem, with the lower heterogeneous landscape in the study area. Through the analysis of two phases of landscape pattern beforeand after the implementation of the Grain for Green, it can be concluded that Grain for Green campaign was the main driving force for positive evolution of the landscape pattern in the study area.
2013 Vol. 11 (2): 97-103 [
Abstract
] (
804
) [
HTML
1KB] [
PDF
1600KB] (
941
)
104
XIA Weibing
Disscusion on soil erosion rainfall physics
The soil erosion rainfall physics as a new subject needs to be established. From soil erosion rainfall physics concept, this paper discusses the main content of the soil erosion rainfall physics and related disciplines. On the basis of a review on the brief history of the correction theory development, this paper presents that soil erosion rainfall physics is an interdisciplinary science between meteorology and soil and water conservation, and is worthwhile to develop as a new subject.
2013 Vol. 11 (2): 104-107 [
Abstract
] (
739
) [
HTML
1KB] [
PDF
692KB] (
1060
)
108
ZHang Rui, Geng Guijun, Bai Gangshuan
Effects of application rate of super absorbent polymers on soil moisture and Solanum lycopersicum growth
In order to explore suitable dosage of super absorbent polymer (SAP) in Solanum lycopersicum production in Hetao irrigation district, Inner Mongolia, with no BJ2101-L SAP for control, different dosages of BJ2101-L SAP (30.0 kg/ hm2, 37.5 kg/ hm2, 45.0 kg/ hm2 and 52.5 kg/ hm2 ) were furrowing-applied before S. lycopersicum planting. Soil moisture, photosynthetic rate, growth, yields,and water use efficiency (WUE) of S. lycopersicum were determined during different growth stages. The results showed that different SAP dosage not only enhanced farming - layer soil moisture in revival stage,flowering stage and young fruit stage, but improved photosynthetic rate and transpiration rate in flowering stage and young fruit stage. In addition, the effects increased with the dosage increasing. SAP also promoted the roots, stems and leaves growth and development. Compared with the contrast, the yields increased 3.48%, 7.83%, 11.01% and 10.29%, the biomass increased 24.9%, 56.7%, 94.0%and 82.7%, the water output rate increased - 0.2%, 3.9%, 6.2% and 5.2%, WUE increased 19.1%, 50.4%, 81.5% and 69.2% at dosage of 30.0 kg/ hm2, 37.5 kg/ hm2, 45.0 kg/ hm2 and 52.5 kg/ hm2, respectively. Trials results indicated that the implementation of SAP could enhance S.lycopersicum growth and WUE, as well as the dosage of 45.0 kg/ hm2 had better effects.
2013 Vol. 11 (2): 108-103 [
Abstract
] (
742
) [
HTML
1KB] [
PDF
826KB] (
903
)
114
Mao Xinhua, Wei Hao, Jin Yun
Analysis of soil hydraulic erosion status in Shanghai and its soil and water conservation measures
In order to study the current situation of soil erosion and conservation measures in Shanghai,based on the soil and water conservation census result of the China Census for Water, and combined with the basic situation of Shanghai, the paper analyzed the present situation of hydraulic erosion and soil and water conservation measures of the city. The result showed that the soil and water loss area covered more than 200 km2, and mainly occurred at the riparian zone. Furthermore, the soil and water loss caused by construction project is also serious. The soil and water conservation measures in city center is relative perfect, but that in suburb channels especially slope protection are not effective, which almost presented a state of nature, subsequently easy to loss soil and water. Therefore, the riparian restoration and treatment are key task for soil and water conservation in Shanghai. At the same time, in order to prevent artificial soil and water loss, we should strengthen supervision of construction project and monitoring of soil and water conservation.
2013 Vol. 11 (2): 114-118 [
Abstract
] (
804
) [
HTML
1KB] [
PDF
1974KB] (
1119
)
