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Journal Extension and Development of  Watershed Managment
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 Volume7،Number25 ،Successive25
 
1
Hydro-geochemical Investigation of Malekan Plain, Considering the Contamination of Minor and Rare Elements
( 88 Visit ) ( 27 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : Quantitative and qualitative conservation and prevention of water resources contamination are increasingly important. The existence and accumulation of elements in drinking water, which their chemical properties are stable, higher than the acceptance criteria can cause the wide range of diseases and is one of the most important factors in water contamination. Study of the Malekan plain hydrochemistry, distribution of rare elements in the aquifer and their effects on groundwater contamination in the study area, is the main aim of the present study. In order to assess the groundwater quality, 41 samples of groundwater resources were collected and analyzed. The high electrical conductivity in the west and northwest parts of the study area is due to high concentrations of gradual increase in major elements, through groundwater flow and the water quality has decreased from the recharging areas to the end regions of the plain. The result showed the heavy metals concentration such as Zinc, Chromium, Manganese, Iron and Aluminum were less than standard, in all samples. Arsenic contamination in the northwest part is the result of groundwater evaporation at the end of the plain. Fluorine concentration was less than both WHO guidelines and the official Iranian government standard for the chemical quality of water in all samples. Furthermore results showed reveal the effect of anthropogenic activities on groundwater quality, addressing the increasing of nitrate and boron concentration. Cation exchange, leaching of salty-clayey layers, human activities and groundwater evaporation at the end of the plain could be the main reasons for the groundwater quality reduction.
Area of Expertise : Groundwater, Pollutants, Heavy metals, environmental evaluation.

2
Investigating of Spacing spatial and temporal distribution of Quality and Quantities groundwater at Noorabad Plain
( 117 Visit ) ( 35 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : Results of urban growthing and increasing pollutants water leads to decreasing of quality and quantity of water resources. Quality and Quantities groundwater at Noorabad Plain are conducted in this study. For this purpose, traced the hitographs of rainfall from April 1997 to 2017.  According to the drawn hitograph, the years 2004, 2010 and years 2014, 2017 were selected as rainy years and low rainfall years respectively. Spatial distribution’s map for concentration of groundwater quality parameters and groundwater level by Kriging method were created. In addition, the best of selection of model according to the assessment criteria (RMSES, RMSE, ASE and MSE) were created for these years. By dividing the product by the rank of each parameter in its average weight on the total number of parameters, the GQI index was prepared to study the groundwater quality in the years studied. The results show that: the water quality of this area is in a good grade during the studied years. In all of the examined years, the northern and southeast areas of the noorabad plain have better quality than other areas. By investigating of quantitative and qualitative maps, it was noted that, by increasing the distance of groundwater level from the ground, water quality becomes more appropriate.
Area of Expertise : GIS, GQI, Interpolation, Kraiging, Lorestan

3
Evaluation of the Effect of Detailed Implementation Project of the Dokhtar Borji Watershed, Andimeshk County, with an Emphasis on the Successful Experience of Roller Compacted Concrete Dams for the First Time in Iran's Watershed Management
( 101 Visit ) ( 17 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : The present study was conducted to analyze the detailed implementation project of the Dokhtar Borji Watershed where located at the upstream of Karkheh Dam. To this end, the results of calculating of study environmental variables at before project implementation including physiography, climate, hydrology, lithology, groundwater, pedology, vegetation, socio-economic, erosion and sediment was considered. Thence, via comparing these results with results of calculating of study environmental variables after project implementation, the effect evaluation on the environmental of two study units was done. The erosion of the area is estimated between 17 and 21 t ha-1. Erodible formation of Lahbary and quaternary sediments in the study watershed entering a high percentage of eroded soil into the reservoir of Karkheh Dam. Therefore, these conditions insisted the managers of the watershed to implement different operations in accordance with the natural conditions of the region. The carried out operations were included biological activities viz., transplanting, seeding and pit- seeding and the check dam construction with types of bag, bag-gabion, dry-stone, gabion and roller compacted concrete (RCC). According to anecdotal observations and project assessment, 80 % of the cultivated species have been established, and due to the failure to application of the technical principles of planting, the lack of high quality species, the lack of stacking in high slopes, the presence of pests and inappropriate irrigations, 20 % of adapted seedlings have not been established. A comparative study on the performance of check dams in sediment controlling with RCC dams showed that the mentioned dams were successful and could play an important role in sedimentation mitigation.
Area of Expertise : Management of watershed, Restoration operations, Soil erosion control, Water and soil degradation, Watershed Practices

4
Estimated future changes in groundwater extraction from the main watersheds of Iran
( 140 Visit ) ( 42 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : Water is a vital source of growth and development in human societies. In dry and semi-arid areas like most areas of Iran, because of lack of surface water, groundwater resources are used. This research studies the process of extraction of groundwater resources from the six main watersheds of Iran during the years of (1982-2018) and predicts the rate of harvesting of these resources by 2025. For this purpose, the Time series model was used in the ARIMA method. The results showed with current management that the rate of harvesting of these resources in the future will increase in the most of the basins and this will endanger the availability of these resources and human life. Pricing of water resources used for agriculture, the installation of the smart meters and the sustainable management of groundwater resources are recommended to improve the predicted state.
Area of Expertise : Groundwater, Time series, Climate changes, Rate of harvesting, Arid regions.

5
Prioritization under the Caesar watershed based on flood occurrence using Borda algorithm
( 100 Visit ) ( 29 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : Determining the priority of executive operations in watershed management projects to reduce the risk of flooding due to the impact of various parameters, complex and, of course, important. The game theory has a high performance in making the optimal decision to solve multi-objective problems. Caesar was presented with the Borda method, which is the result of the competition of all the effective parameters in the basin in all sub basins. By implementing the Borda scoring method, residential parameters with 93.5, drainage density of 91 and average slope, and the shape of the sub area with a score of 90.5, were the most effective parameters in the competition between the 12 parameters in all sub-domains. Finally, the priority mapping of the sub-domains Caesar was presented with the Borda method, which is the result of the competition of all the effective parameters in the basin in all sub basins.
Area of Expertise : Flood, Game theory, Multi-goal issues, Optimal decision, Watershed management.

6
Placement of lateral intake in order to control incoming sediment
( 90 Visit ) ( 23 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : The diversion flow pattern is quite 3-D and non-uniform. In general, flow diversion occurs either naturally like braided rivers or artificially like lateral intakes. According to the performed investigations, the intake location affects the rate of water intake and sediments entry into the diversion channel. The use of lateral intake along with diversion channel is one method of providing water from river. Given the fact that most rivers are in nature in their meander state, so determining the position and angle of water intake is very important. Since the main purpose of lateral intakes is to facilitate water transfer without sediments and most of the rivers are zigzagged through their path, therefore, more researches on the location of the lateral intake and its angle on the arc paths it seems necessary. The results showed that the effective parameters in sediment deviation include: Discharge ratio, Flow conditions [Froude number], Sediment load [Bed load and Suspended load], Water intake location [On the channel arch], Deviation angle, Input threshold  and Submerged plates that researchers examined impact of some of them to choose the best the intake location.
Area of Expertise : Discharge Rate, Diversion flow, Hydraulic structure, Intake location, River.

7
Analysis Effect of Biological Recovery Activities on Physio- Chemical Properties of the Sandy Lands of Dejgah Watershed, Fars Province
( 79 Visit ) ( 24 Download )  Abstract And Keywords
Publication Information : Volume 7 - Number 25 - Successive Number 25
Auhtors :
Abstract : One of the biological methods to sand dune stabilization and reclamation of desert, is planting the resistant species inbare anddry lands. Considering the importance of biological recovery plans, this study was carried out to investigate the effect of planting of Prosopis juliflora species on physical and chemical properties of soil. For this purpose, three sites were selected: control, sub-canopy and between- canopy site. The results of this study showed that the effect of planting Prosopis juliflora species on physicochemical properties of soil is significant. The maximum amount of organic materialwas related to the sub-canopy site (5.22%), the highest amount of Cationic exchange capacity  and pH were related to the sub-canopy site (98.75%), sub- canopy site (1.34 dS/m) andcontrol site (10.38). Soil texture results indicated soil texture change from fine sand in the control site to sandy clay loam in the between- canopy site and loam in the sub-canopy site. The overall results of this research indicate that the implementation of biological operations through the planting of Prosopis juliflora species plays an important role in improving soil characteristics and controlling wind erosion.
Area of Expertise : Combathing desertification, Prosopis Juliflora, Wind erosion, Control.

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