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Identification and Investigation of Changes in Area of Hoseynabade Mishmast Village Using Satellite Images 基于卫星影像的细边村面积变化识别与调查
Pub Date : 2021-02-01 DOI: 10.47176/JWSS.24.4.42521
حمیده صدوقی, طاهر رجایی, نیما روحانی
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引用次数: 0
Optimization of Reservoir Dam Operation Using Gray Wolf, Crow Search and Whale Algorithms Based on the Solution of the Nonlinear Programming Model 基于非线性规划模型求解的灰狼、乌鸦和鲸鱼算法优化水库大坝运行
Pub Date : 2021-02-01 DOI: 10.47176/jwss.24.4.42751
H. Ahmadi
Optimizing the water resources operation, especially in the agricultural sector, which has the largest share in the water resources operation, is extremely important. Therefore, in this research, while introducing Whale, Gray Wolf and Crow Search Optimization Algorithms, their performance in the optimum operation of Golestan single-reservoir system Dam was evaluated with the aim of providing water demand for the downstream lands based on reliability, Reversibility, and vulnerability indices. In this optimization problem, the objective function was defined as the minimization of the total deficiency during the operation period. Meanwhile, the constraints of continuity equation, overflow, storage and reservoir release volume were applied to the objective function of the problem. Then, the results were compared with the absolute optimal value based on the nonlinear programming method obtained from GAMS software; finally, a multi-criteria decision-making model was developed to rank the optimization algorithms in terms of performance. The absolute optimal response obtained by the GAMS software based on the nonlinear programming method was 19.41. The results showed that the Gray Wolf algorithm performed better than the other algorithms in optimizing the objective function, so that the average responses in Gray Wolf, Crow Search and Whale algorithms were 92, 84 and 67% of the absolute optimal response, respectively. Furthermore, the Gray Wolf optimization algorithm performs better than the Whale and Crow Search algorithms in all parameters. In addition, the coefficient of variation of the responses obtained by the Gray Wolf algorithm is 2 and 1.43 times smaller than that in the Whale and Crow Search Algorithms, respectively. Finally, the results of the multi-criteria decision-making model showed that the gray wolf algorithm had the first rank, as compared to the other two algorithms studied in solving the problem of the optimal operation of the Golestan dam reservoir.
优化水资源运行,特别是在水资源运行中占比最大的农业部门,具有极其重要的意义。因此,本研究在引入鲸鱼、灰狼和乌鸦搜索优化算法的同时,基于可靠性、可逆性和脆弱性指标,对它们在Golestan单库系统大坝优化运行中的性能进行评价,以满足下游土地的用水需求。在此优化问题中,目标函数定义为运行期间总缺额的最小化。同时,将连续方程、溢流约束、库容约束和水库放水量约束应用于问题的目标函数。然后,将结果与基于GAMS软件的非线性规划方法得到的绝对最优值进行比较;最后,建立了一个多准则决策模型,对优化算法的性能进行排序。基于非线性规划方法的GAMS软件得到的绝对最优响应为19.41。结果表明,灰狼算法在优化目标函数方面优于其他算法,灰狼算法、乌鸦搜索算法和鲸鱼搜索算法的平均响应分别为绝对最优响应的92%、84%和67%。此外,灰狼优化算法在所有参数上都优于鲸鱼和乌鸦搜索算法。此外,灰狼算法得到的响应变异系数比鲸鱼和乌鸦搜索算法分别小2倍和1.43倍。最后,多准则决策模型结果表明,在求解Golestan大坝水库优化调度问题时,灰狼算法优于其他两种算法。
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引用次数: 4
Investigating the Effect of Phosphate Solubilizing Microorganisms of Insoluble Phosphorus on Phosphorus Acquisition and Utilization Efficiency in Corn (Zea mays L.) 不溶性磷增磷微生物对玉米磷获取和利用效率的影响
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.10679
M. Rasouli-Sadaghiani, R. E. Karimabad, R. Vahedi
In order to investigate P acquisition efficiency (PACE) and P utilization efficiency (PUTE) of the corn in the presence of phosphate-solubilizing microorganisms (PSMs), a factorial experiment was carried out in a completely randomized design in the greenhouse. The factors were including P sources (tricalcium phosphate (TCP) and rock phosphate (RP)) and microbial inoculation (control, soluble P as KH 2 PO 4 (Ps), inoculation with bacteria (PSB), inoculation with fungi (PSF), co-inoculation of PSB + PSF). At the end of growth period, plant dry weight and P content in plant and soil available-P were measured and then PACE, PUTE and phosphorus efficiency (PE) indices were calculated. The results showed that, the interaction of phosphate source and microbial inoculation was significant with respect to shoot P content, soil P, PUTE and PE. PSF-TCP treatment increased 7 times shoot phosphorus content compared to cont-RP treatment. PUTE in Cont-TCP treatment was 2.35 times higher than the TCP-P S . The inoculation of PSF increased the PACE 1.61 times compared to co-inoculation of PSB + PSF tretment. Also, the highest PE index (99%) was obtained from SF-TCP treatment. In general, in calcareous soils with low P availability, inoculation of PSM with insoluble phosphorus sources can meet the phosphate needs of the plant.
为了研究磷溶微生物(psm)存在下玉米的磷获取效率(PACE)和磷利用效率(PUTE),采用完全随机设计的因子试验,在温室中进行了试验。影响因素包括磷源(磷酸三钙(TCP)和磷矿粉(RP))和微生物接种(对照,可溶性磷为kh2po4 (Ps),细菌接种(PSB),真菌接种(PSF), PSB + PSF共接种)。在生育期末测定植株干重、植株中磷含量和土壤有效磷含量,计算PACE、PUTE和磷效率(PE)指数。结果表明,磷源与微生物接种对地上部磷含量、土壤磷、PUTE和PE的交互作用显著。PSF-TCP处理比对照rp处理提高了7倍的地上部磷含量。对照组PUTE是TCP-P组的2.35倍。与PSB + PSF共接种相比,接种PSF可使PACE提高1.61倍。此外,SF-TCP处理的PE指数最高(99%)。一般来说,在磷有效性低的钙质土壤中,接种不溶性磷源的PSM可以满足植物对磷的需求。
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引用次数: 0
Qualitative Assessment of the Coastal Plain of Talesh using the Modified DRASTIC Vulnerability Method 基于改进DRASTIC脆弱性法的塔列什沿海平原定性评价
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.40842
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引用次数: 0
Effects of Conservation Tillage Technology Adoption on Wheat Yield, Water Use and Household Poverty 保护性耕作技术应用对小麦产量、水分利用和农户贫困的影响
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.41332
A. Sheikhzeinoddin
The interaction of population growth, technological improvement and climate change have impacted severely on agricultural and environmental sustainability. In Iran, conventional tillage practice has resulted in soil erosion and loss of soil organic matter. In this regard, Conservation Agriculture (CA) forms part of this alternative paradigm to agricultural production systems approaches and can be regarded as a means to enhancing food productivity, reducing poverty, and mitigating the consequences of climate change in rural households. The objectives of this study were to examine the determinants and impacts of CA technology on wheat yield, poverty gap and water use. To this end, an endogenous switching regression (ESR) model was employed to estimate the impacts of CA technology on continuous variables such as wheat yield, poverty gap and water use. A sample of 260 farmers from Zarghan district was selected for interview collection of necessary farm level data. The results indicated that in the select equation of ESR model, ten coefficients (out of 12) are significant at the 5% level or higher. Knowledge of soil quality, access to credit, access to information, education, farm size, ownership of machinery, participation in agricultural extension activities and farmer’ perception have positive and significant effects on the probability of adopting CA. In contrast, variables such as the distance to shopping center and number of land parcels have negative and significant influence on adoption. Also, the results of ESR model and counterfactual analysis showed that wheat yield would increase by 1.05 tons and poverty gap and water use would decrease by 20% and 910 cubic meters per hectare respectively if farmers adopt CA technology.
人口增长、技术进步和气候变化的相互作用严重影响了农业和环境的可持续性。在伊朗,传统耕作导致土壤侵蚀和土壤有机质流失。在这方面,保护性农业(CA)是农业生产系统方法的替代范例的一部分,可被视为提高粮食生产力、减少贫困和减轻气候变化对农村家庭影响的一种手段。本研究的目的是研究农作技术对小麦产量、贫困差距和水分利用的决定因素和影响。为此,采用内生转换回归(ESR)模型估计CA技术对小麦产量、贫困差距和水资源利用等连续变量的影响。选取扎尔干地区260名农民进行访谈,收集必要的农场层面数据。结果表明,在ESR模型的选择方程中,12个系数中有10个在5%及以上水平上显著。土壤质量知识、信贷获取、信息获取、教育、农场规模、机械所有权、参与农业推广活动和农民感知对采用农业生产行为的概率有显著的正向影响。相反,距离购物中心的距离和地块数量等变量对采用农业生产行为的概率有显著的负向影响。ESR模型和反事实分析结果表明,采用CA技术可使小麦单产增加1.05 t,使贫困差距和用水量分别减少20%和910 m3 /公顷。
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引用次数: 3
Evaluating the Performance of the Artificial Bee Colony Algorithm in Flood Frequency Analysis 人工蜂群算法在洪水频率分析中的性能评价
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.38454
K. Shirani
Selection of the appropriate distribution function and estimation of its parameters are two fundamental steps in the accurate estimation of flood magnitude. This study relied on the concept of optimization by meta heuristic algorithms to improve the results obtained from the conventional methods of parameter estimation, such as maximum likelihood (ML), moments (MOM) and probability weighted moments (PWM) methods. More specifically, this study aimed to improve flood frequency analysis using the Artificial Bee Colony algorithm (ABC). The overall performance of this algorithm was compared to the conventional methods by employing goodness of fit statistics, correlation coefficient (CC), coefficient of efficiency (CE) and root mean square error (RMSE). The study area, Babolrood catchment located in southern bank of Caspian Sea, has been subjected to annual flooding events. A total of 6 hydrometry stations in the study area were delineated and their data were used in the analysis of 6 distribution functions of Normal, Gumbel, Gamma, Pearson Type 3, General Extreme Value and General Logistic. This analysis indicated that Gamma and Pearson Type 3 were the most appropriate distribution functions for flood appraisal in the study area, according to the ABC and conventional methods, respectively. Also, the results showed that ABC outperformed ML, MOM and PWM; so, Gamma could be recommended as the most reliable distribution function for flood frequency analysis in the study area.
选择合适的分布函数及其参数的估计是准确估计洪水震级的两个基本步骤。本研究利用元启发式算法优化的概念,改进了传统参数估计方法如极大似然(ML)、矩量(MOM)和概率加权矩量(PWM)方法所得到的结果。更具体地说,本研究旨在利用人工蜂群算法(ABC)改进洪水频率分析。通过拟合优度统计量、相关系数(CC)、效率系数(CE)和均方根误差(RMSE)对算法的总体性能与传统方法进行比较。研究区位于里海南岸的Babolrood集水区每年都会发生洪水事件。研究区共划分了6个水文测量站,并利用这些测量站的数据对6个分布函数进行了Normal、Gumbel、Gamma、Pearson Type 3、General Extreme Value和General Logistic分析。分析表明,Gamma和Pearson 3型分布函数分别是ABC法和常规方法最适合研究区洪水评价的分布函数。结果表明,ABC优于ML、MOM和PWM;因此,Gamma可作为研究区洪水频率分析最可靠的分布函数。
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引用次数: 0
Environmental Investigation and Spatial Distribution of Heavy Metals in the Street Dust of Ahvaz City 阿瓦士市街道粉尘重金属环境调查及空间分布
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.36175
N. Ghanavati, A. Nazarpour
Dusts contain heavy metals such as Pb, Zn, Cu, Cr, Cd and As that can threat human's health and environment. Therefore, the spatial distribution of heavy metals concentration and soil pollution monitoring and environmental quality protection seem to be essential. To assess heavy metals pollution level in Ahvaz street dust, 115 street dust samples were collected from main pedestrians. The samples were analyzed by Atomic Absorption (AAS). The pollution level was estimated based on the geo-accumulation index (I geo ), contamination factor (CF) and the enrichment factor (EF). The average concentration values of Pb, Zn, Cu, Cr, Cd and As were found to be 197.6, 150.1, 179.7, 101, 5.6 and 14.2 mg/kg, respectively. Pearson's correlation coefficient also indicated that Pb, Zn, Cu and Cr had a significant correlation showing similar possible anthropogenic sources. On the other hand, Cd and As showed a lower correlation with other metals, indicating that they belonged to the geogenic sources. The results of contamination factor, enrichment factor and geo-accumulation index also indicated that Pb, Zn, Cu and Cd had a high contamination level. Also, areas with high population density, heavy traffic volume, and industrial activities exhibited a high level of heavy metals contamination.
粉尘中含有Pb、Zn、Cu、Cr、Cd、as等重金属,对人体健康和环境构成威胁。因此,重金属浓度的空间分布与土壤污染监测和环境质量保护显得至关重要。为评价阿瓦士街道粉尘重金属污染水平,采集了115份主要行人街道粉尘样本。采用原子吸收光谱(AAS)对样品进行分析。根据地质聚集指数(I geo)、污染因子(CF)和富集因子(EF)对污染程度进行了评价。Pb、Zn、Cu、Cr、Cd和As的平均浓度分别为197.6、150.1、179.7、101、5.6和14.2 mg/kg。Pearson相关系数还表明,Pb、Zn、Cu和Cr具有显著的相关性,表明可能的人为来源相似。另一方面,Cd和As与其他金属的相关性较低,表明它们属于地源。污染因子、富集因子和地聚集指数结果也表明Pb、Zn、Cu和Cd具有较高的污染程度。此外,人口密度高、交通流量大、工业活动频繁的地区重金属污染水平较高。
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引用次数: 0
The Influence of Soil Properties on the Wind Erosion Rate at Different Regions of Kerman Province 克尔曼省不同地区土壤性质对风蚀速率的影响
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.6911
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引用次数: 2
Estimation of Sugar Cane Evapotranspiration using SEBAL and SEBS Algorithms and Priestly-Taylor Method (Case Study of Amir Kabir Cultivation and Industry) 基于SEBAL、SEBS算法和priestley - taylor方法估算甘蔗蒸散量(以阿米尔卡比尔种植和工业为例)
Pub Date : 2020-07-01 DOI: 10.47176/jwss.24.3.39832
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引用次数: 0
The Effect of Slope Position and Land Use on Some Soil Physical and Chemical Properties in Koohrang Area of Chaharmahal and Bakhtiari Province 坡地位置和土地利用方式对恰尔马哈尔省和巴赫蒂亚里省库朗地区土壤理化性质的影响
Pub Date : 2020-04-01 DOI: 10.47176/jwss.24.1.40741
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引用次数: 0
期刊
Journal of Water and Soil Science
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