• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊

1998 Vol. 9, No. 1

Display Method:
Water Resaurces System Planning for Sustaining Utilization
Feng Shangyou, Mei Yadong
1998, 9(1): 1-6.
Abstract:
Based on the ideas of Sustainable development,this paper proposes a theortical framework for Sustaining water resources system Planning.It contains some basic issues sach as the weaknesses of now available water resources planning,the guide thinking and princeple,the task and Contents of levels planning,the selection of damsite and water reser voir capacity,and the sustainale development assessment of water sustaining utilization.
Spatial Variability of Soil Moisture Under Sprinkler Irrigation
Li Jiusheng, Lei Zhidong, Yang Shixiu
1998, 9(1): 7-14.
Abstract:
Crop yield response to sprinkler irrigation depends mainly on the spatial distributions of applied water within the root zone,however,we have quite limited know ledge aboutit.The redistributions of water in the soil were therefore observed under the conditions of sprinkler uniformity (CU) ranging from 53% to 98% and application amount from 5 to 58 mm,on two different soil types—a volcanic ash soil and a sandy loam soil.The distribution of bulk density was examined and showed that it can be represented by a normal distribution function for both soil types.The autocorrelation functions and semivariograms were calculated for water application and soil water content 24 h after application ceased to determine their spatial dependency.Sprinkler water application demonstrated a correlative length of 4 to 6 m,which increased with wind velocity during the experiments,but water applied by a rainfallevent was spatially independent.Soil water contents for 24 hrs after water application ceased exhibited a correlative length of 5 to 6m and appears to be independent of application uniformity.The field experiments also showed that the water was more uniformly distributed in the soil than sprinkler water applied on the ground surface,and the uniformity of water in the soil was closely related to the uniformity of initial soil water content and the total water applied.
Investigation on Basic Probability of Grain Motion
Hu Chunhong
1998, 9(1): 15-21.
Abstract:
Sediment motion has both definite respect and stochastic respect.in this paper,the stochastic feature and expression of flowing water,size of bed meterial and sediment motion have been analyzed.It is pointed out that there are four basic forms of sediment motion in flowing water,and the four basic forms of sediment motion usually transter each other with the variation of flowing water and sediment conditions,and a probability exists from a form of sediment motion to other form,so there are sixteen probability for four forms of sdiment motion.The sixteen transfer probability can be represented by the four basic probability of the four basic forms.The calculated methods of the four basic probability have been studied by theoretical analysis.The measured data agree with calculated basic probability of the four basic forms very well.
A Sutdy on the Feature and Cause of Runoff in the Upper Reaches of Yellow River
Li Dongliang, Zhang Jiali, Quan Jianrui, Zhang Kejian
1998, 9(1): 22-28.
Abstract:
In this paper a diagnostic analysis has been performed by using the data of monthly mean runoff of Tangnaihai hydrometric station in the upper reaches of Yellow River from 1956 to 1994.It is shown that there is a good persistence in winter half year especially,its significant lag correlation can reach more than 6~8 mont hes from Automn to nextearly Summer,the inflexion period is from Aug.to Sept.In recent 40 years,the runoff evolution was a poor to rich to poor processes.The anuual mean runoff appeared obviously 7 year period and 14 year oscillation in Automn.The probability of the flow-off in each rank is forty-one percent of low flow years,the anomaly year can reached two-third.Precipition over Tibetan plateau in summer and Automn have obviously contribution to runoff at the contemporary and lag half year.The early thermal for cing over tibetan Plateau and feature of general circulation have an indication to the runoff forecast in Summer and Automn.
Design and Development of the Real Time Flood Control System Consisting of Baishan and Fengman Reservoir
Cheng Chuntian, Wang Bende, Li Chengling, Li Xinting
1998, 9(1): 29-34.
Abstract:
Based on the Chinese-Windows enviroment and utilized the object-oriental programming,the real-tine flood control system consisting of Baishan and Fengman Reservoirs is successfully designed and devel oped.The system,which has the advantage of flexible man-computer interface and abundant information,can retrieve,process the rainfall data from the remote sensing rain gauges,forecast runoff and produce,compare and select the system operational ternatives.The system rules of design and development,and some key technolgy,which may be benefical for designing other flood control systems,are introduced briefly.
A New Water Quality Model for Plain Rivers System: A Combined Units Water Quality Model
Jin Zhongqing, Han Longxi
1998, 9(1): 35-40.
Abstract:
Accor ding to river network's features of hydraulics and water quality,this paper discusseses the possibility dividing network into cells and constructing water quality model.On the basis of finite volume method,the details of the water quality mathematical model was given.As a check,the model was successfully used in NanTong river network.
Research on Rainfall Pattern of Urban Design Storm
Cen Guoping, Shen Jin, Fan Rongsheng
1998, 9(1): 41-46.
Abstract:
The impacts of rainfall pattern of short duration storm on urban runoff are obvious.In this paper the data of four raingauge stations are classified and counted by the fuzzy mode recognition method.The distributive character of rain-fall pattern of short durat on storm is given.A design storm pattern satisfied for the urban drainage design is obtained by simulation and comparison.
Monitoring Heavy Rains and Floods of July 1996 in South China by Using SSM/I Data
Jin Yaqiu
1998, 9(1): 47-51.
Abstract:
The remote sensing data of DMSP SSM/I over south China during heavy rains and flooding of July 1996 are analyzed.Some new brightness temperature indices,such as the scattering index SI for rain detection,flood alarming index FI,and polarization index PI for surface wetness,are defined,and the thermal emissions at SSM/I seven channels during July observations are studied.By using SSM/I data,temporal and spatial variation of these indices are presented.The detection of heavy rains and floods,and the anomalo us distribution of precipitation are discussed.
The Application of the 218P0 Method to Seek Crevice Water of Rock Stratum
Li Huien, Xu Jaxin, GuLin, Hao Guiwen, Zhao Peizhen
1998, 9(1): 52-58.
Abstract:
This paper mainly describes the base principle of application the 218P0 method to seek crevice water of rock stratum,illust rates the base law of the trans-formation,concentration,storage,abundant radon and abundant water,poorly radon and poorly water,synchronous corresponding,and consitent position of water and radon under the fault zone condition,etc.,and introduces the curves types of high abnormal kurtosis and low abnormal hollow,and normal gently type,as well as their analysis method.The test and practice indicate that this seeking water method has the advantages of quick,accuracy,time-and labour-saving,etc.,and supplement other method to seek water and determine the well position,structuring well rate 98.2%.
The Application of LOTUS 1-2-3 Software to Parameter Estimation of Non Equilibrium Flow Pumping
Zhou Xingguo
1998, 9(1): 59-64.
Abstract:
The paper uses the Gause-Newton iterative algorithm to analysize non-equilibrium flow pumping test data,and utilizes dynamic table,database,graph and matrix function of LOTUS 1-2-3 to calculate the best transmissibility of aquifer,storage coefficient,and permeability coefficient.The procedure has time-saving and high efficiency.
Numerical Analogue of Wind Driven Current in Meiliang Lake Area by Inlay-Mesh Model
Huang Qun, Jiang Jiahu
1998, 9(1): 65-69.
Abstract:
This paper discusses application of an inlay-mesh model to the Meiliang Lake Area's wind-driven currents in the cases of various wind regimes.The results showed that the water of Taihu Lake flows into Meiliang Lake in the case of the windS,the water of Meiliang Lake flows into Taihu Lake in the case of the wind Nduring the early period of wind forcing,and that stable wind-driven current is the clockwise cyclic gyres in the case of Sand E wind direction,and the counterclock-wise cyclic gyres in the N and W wind direction.The water exchange between Meiliang Lake and Zhushang Lake is separated by the reclamation of Mashang area,influencing the winddriven current types of Meiliang Lake,and causing water renewing to be decelerated.
Present and Future of Water Resources Development in Lancang River Basin in Yunnan Province
Liu Heng, Liu Jiufu, Tang Haixing
1998, 9(1): 70-76.
Abstract:
Lancang River is an international river flowing from China to Vietnam via Myanmar,Laos,Thailand and Cambodia.The downstream river from the border of China,Laos and Myanmar to the river mouth is called Mekong River.Lancang is the largest international river in China and one of very important hydropower bases in sout hwest China.There are 8 cascade dams are planned which one completed.Lancang river basin abounds with natural resources and has great potential for further development,but the water resources development is lower.The further development will focus on hydropower,navigation and irrigation.The development has some special characters,i.e.integrated,hydropower priority and international cooperation.Refer to international river and riparian countries concerns,the water resources development in Lancang should follow principles of peacefuluse,friendly negotiation and equal mutual benefits.
Impacts of Climate Change on Hydrology and Water Resources in the Manas River Basin
He Xinling, Guo Shenlian
1998, 9(1): 77-83.
Abstract:
Considering the uneven distribution of snow runoff and precipitation,the catchment is divided into several parts.A water balance model wiich includes the snow storage and snow smelt components is proposed.Using the water balance model,the evey monthly discharge for changing climate conditions have been analyzed and tested.Analyzing the impacts of climate change on hydrology and waer resources in the Manas River Basin.The results indicate:If temperature increase 2℃ and rainf all decrease 20%,then the runoff of summer the runoff of winter the annual runoff will decrease 52.59%,1.77%,46.87%,respectively.
A Review of Stochastic Analysis for Solute Transport at Regional Scale
Yang Jinzhong, Cai Shuying, Ye Zitong
1998, 9(1): 84-98.
Abstract:
Solute transport in heterogeneous formation has been studied with increasing intensity in the past few decades as a result of growing concern about groundwater quality and pollution.The basic theory,methods,and some results are discussed and summarized in this paper.It is widely recognized that the variability of conductivity is the controlling factor for solute transprot at field scale.This paper summarizes some results of the variability of formation and soil hydraulic properties from field experiments.It is shown that the variance of log-transformed hydraulic conductivity is closed to 1 and the correlation length increases with the measurement scale.By considering the hydraulic properties as random fields,Lagrangian and Eulerian methods were used to study solute transport in regional scale.The mean concentration satisfies convection-dispersion equation with macor-scale parameters.The paper also shows some results of concentration variance which is used as a measure of the adequacy of the mean concentration.The results em phasize the key role of variance and correlation length of log-transformed conductivity field.Based on this review,we point out some further research fields.
1998, 9(1): 99-106.
Abstract: