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151.
Noa Ohana-Levi Amir Givati Nurit Alfasi Aviva Peeters 《Journal of Land Use Science》2018,13(1-2):81-101
Urbanization dynamics are commonly subjected to powerful market forces, only partly managed by land-use plans. The density, location and pattern of urbanized areas affect rainfall-runoff relations. Consequently, it is essential to understand future impacts of urbanization on runoff and produce focused regulation. The goal was to analyze land-cover scenarios and their impact on runoff in an urbanized watershed in Israel. Present and predicted land-cover scenarios in a densely populated watershed were produced. The runoff response to rainfall was then simulated using a hydrological model. The impact of implementing afforestation and quarrying national outline plans was considered. By the year 2050, 50% of the watershed will be urbanized with a linear increase in runoff response. Afforestation and quarrying plans show little effect on runoff, although quarries may decrease runoff through percolation. As urbanization is expected to continue spreading in adjacent watersheds, statutory measures should be applied to mitigating runoff. 相似文献
152.
Environmental Fluid Mechanics - The aim of the present study is to numerically investigate the scouring phenomenon downstream of a stilling basin for a wide range of Froude number and size of bed... 相似文献
153.
154.
Nanoscale zero-valent iron (nZVI) has received considerable attention as a potential in situ remediation technology for treating chlorinated solvent source zones. Experimental and mathematical modeling studies were conducted to investigate the performance of nZVI in the transformation of tetrachloroethene (PCE) entrapped as a dense nonaqueous phase liquid (DNAPL). Injection of a 60 g/L suspension of nZVI into a column containing 20-30 mesh Ottawa sand and PCE-DNAPL at a residual saturation of 5.5% resulted in a uniform distribution of nZVI and minimal displacement of PCE. Subsequent flushing with 267 pore volumes of water containing 3mM CaCl(2) at a Darcy velocity of 0.75 m/day resulted in steady-state effluent concentrations of PCE near the solubility limit (ca. 200mg/L) and production of dissolved-phase ethene (10-30 mg/L). Over the duration of the experiment, approximately 30% of the initial PCE-DNAPL mass reacted to form ethene, 50% was eluted as dissolved-phase PCE, and 20% remained in the column as PCE-DNAPL. To further explore the implications of the nZVI column results, a multiphase transport model was developed that incorporated rate-limited PCE-DNAPL dissolution and reactions with nZVI. Using a fitted pseudo first-order transformation rate coefficient of 1.421/h, the model accurately captured observed trends in effluent concentrations of PCE and ethene and overall mass balance. A model sensitivity study reveals a strong dependence of treatment effectiveness on system characteristics. The sensitivity analysis suggests that an increase in the extent of PCE transformation is facilitated by decreasing flow rate, emplacement of nZVI down-gradient of the DNAPL source zone, and decreasing length of the DNAPL source zone. These findings indicate that, although emplacement of high concentrations of nZVI within a PCE-DNAPL source zone can result in substantial transformation of the parent compound, careful attention to design parameters (e.g. flow rate, location and amount nZVI delivered) will be required to achieve complete conversion to benign reaction products. 相似文献
155.
Iqbal Amir Tang Xuan Jahangir Sayeda Hussain Shahid 《Environmental science and pollution research international》2022,29(45):68161-68178
Environmental Science and Pollution Research - This study examines the endogenous growth theory for technological innovation and economic growth with the role of foreign direct investment (FDI) and... 相似文献
156.
Entezari Saber Al Mamun Abdullah Mostashari Amir Ganjidoust Hossein Ayati Bita Yang Jun 《Environmental science and pollution research international》2022,29(59):88410-88431
Environmental Science and Pollution Research - Microplastic (MP) pollution is one of the emerging threats to the water and terrestrial environment, forcing a new environmental challenge due to the... 相似文献
157.
Kassaei Farshid Ghodsi Amirhosein Jadidi Amir Mohammad Valipour Mohammad Sadegh 《Environmental science and pollution research international》2022,29(49):73842-73855
Environmental Science and Pollution Research - Solar chimneys are among relatively modern mechanisms in the field of renewable energy which can be employed for power generation or indoor... 相似文献
158.
Razeghi Nastaran Hamidian Amir Hossein Mirzajani Alireza Abbasi Sajjad Wu Chenxi Zhang Yu Yang Min 《Environmental Chemistry Letters》2022,20(1):417-443
Environmental Chemistry Letters - The vast amount of plastic waste emitted into the environment is of increasing concern because there is mounting evidence for various toxic effects of... 相似文献