Estimation of groundwater recharge in Wadi Al-Yammaniyah,Saudi Arabia     

Bashir A. Memon  Asadullah Kazi  William J. Powell  A. S. Bazuhair 《Environmental Geology》1986,8(3):153-160

Groundwater recharge by natural replenishment for the unconsolidated alluvial aquifer in Wadi Al-Yammaniyah is estimated on a daily basis instead of the conventional monthly basis The study reveals that during the two-year period (1978 and 1979), the estimated recharge in the area is about 40% of the total average annual rainfall of 155 mm Subsurface underflow estimated at 36×10⁻⁶ m³/yr from the Wadi Al-Yammaniyah aquifer occurs in the vicinity of Wadi Ash-Shamiyah A comparison of the recharge and extracted volumes of water from the aquifer indicates that there is a net increase of 10 million m³ and 38 million m³ of water in the storage for 1978 and 1979, respectively  相似文献   

Influence of geological factors on abrasion and soundness characteristics of aggregates     

Asadullah Kazi  Zuhdi Raja Al-Mansour 《Engineering Geology》1980,15(3-4):195-203

A study has been made of the abrasion and soundness characteristics of crushed-rock aggregates obtained from a wide variety of igneous rocks of volcanic and plutonic origins, that range from acidic to basic in composition. The grain size and the volume of pore spaces were found to be the significant geological factors controlling the evaluation of these two parameters. Fine-grained rocks when compared with coarse-grained rocks having the same porosity were found to be more sound and more resistant to wear.  相似文献   

An artificial neural network-based earthquake casualty estimation model for Istanbul city     

Muhammet Gul  Ali Fuat Guneri 《Natural Hazards》2016,84(3):2163-2178

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SGBR Performance on the Basis of Color and COD Removal from Textile Wastewater     

Eyup Debik  Asli Coban  Gul Kaykioglu  Bergin Beril Kayacan 《洁净——土壤、空气、水》2012,40(6):648-651

This study focused on removal of color and chemical oxygen demand (COD) parameter from textile effluents using a static granular bed reactor (SGBR), which has never been used to treat textile effluents previously. With an organic loading rate (OLR) of 1 kg/m³ day and a hydraulic retention time (HRT) of 48 h, COD and color removal efficiencies were 74 and 61%, respectively, while the removal efficiencies were 72 and 57%, respectively, with OLR of 1.7 kg/(m³ day) and HRT of 24 h. It was concluded that the SGBR could be used as an alternative method to treat and decolorize textile effluents. First order and modified Stover–Kincannon models were used to develop a kinetic model using the experimental data with correlation coefficients (R²) of 0.39 and 0.94, respectively. In regard with the calculated correlation coefficients, modified Stover–Kincannon model, which was used to model anerobic biofilters in previous studies, fitted best with the experimental data and it was stated that SGBR worked as an anerobic biofilter.  相似文献   

Geological controls on groundwater chemistry and arsenic mobilization: Hydrogeochemical study along an E–W transect in the Meghna basin, Bangladesh     

M. Aziz Hasan  Prosun Bhattacharya  Ondra Sracek  Kazi Matin Ahmed  Mattias von Brmssen  Gunnar Jacks 《Journal of Hydrology》2009,378(1-2):105-118

Hydrogeochemical investigations along an E–W transect in the middle Meghna basin show groundwater chemistry and redox condition vary considerably with the change in geology. Groundwater in the Holocene shallow (<150 m bgl) alluvial aquifer in western part of the transect is affected by high arsenic concentration (As > 10 μg/l) and salinity. On the other hand, groundwater from the Pliocene Dupi Tila sandy aquifer in the eastern part is fresh and low in As (<10 μg/l). The Holocene shallow aquifers are high in dissolved As, , Fe and dissolved organic carbon (DOC), but generally low in and . High concentrations (250–716 mg/l) together with high DOC concentrations (1.4–21.7 mg/l) in these aquifers reflect active sources of degradable natural organic matter that drives the biogeochemical process. There is generally de-coupling of As from other redox-sensitive elements. In contrast, the Pliocene aquifers are low in As, and DOC. Molar ratio of /H₄SiO₄ suggests that silicate weathering is dominant in the deeper Holocene aquifers and in the Pliocene aquifers. Molar ratios of Cl⁻/ and Na⁺/Cl⁻ suggest mixing of relict seawater with the fresh water as the origin of groundwater salinity. Speciation calculations show that saturation indices for siderite and rhodochrosite vary significantly between the Holocene and Pliocene aquifers. Stable isotopes (δ²H and δ¹⁸O) in groundwater indicate rapid infiltration without significant effects of evaporation. The isotopic data also indicates groundwater recharge from monsoonal precipitation with some impact of altitude effect at the base of the Tripura Hills in the east. The results of the study clearly indicate geological control (i.e. change in lithofacies) on groundwater chemistry and distribution of redox-sensitive elements such as As along the transect.  相似文献   

Chelonodontops bengalensis (Tetraodontiformes: Tetraodontidae): A New Species of Puffer Fish from the Northern Bay of Bengal Based on Morphology and DNA Barcode     

Habib  Kazi Ahsan  Neogi  Amit Kumer  Oh  Jina  Lee  Youn-Ho  Kim  Choong-Gon 《Ocean Science Journal》2019,54(1):79-86

Ocean Science Journal - The new puffer fish species Chelonodontops bengalensis (Pisces: Tetraodontidae) is described from two specimens collected on the southwest coast of the Bay of Bengal,...  相似文献   

Identification of wild and farmed broadhead catfish ( Clarias macrocephalus Günther, 1864) based on morphometry,digestive indexes and flesh quality     

Whan-Air  Wilawan  Thongprajukaew  Karun  Salaeharae  Tasneem  Yoonram  Krueawan 《中国海洋湖沼学报》2018,36(5):1788-1797

Journal of Oceanology and Limnology - Wild and farmed fish generally differ in their nutritional composition. In this study, adult wild and farmed broadhead catfish ( Clarias macrocephalus...  相似文献   

Hydrochemistry and origin of salinity in groundwater in parts of Lower Tista Floodplain,northwest Bangladesh   总被引：1，自引：0，他引：1  

Rumy Afroza  Quamrul H. Mazumder  Chowdhury S. Jahan  M. A. I. Kazi  M. A. Ahsan  M. A. Al-Mansur 《Journal of the Geological Society of India》2009,74(2):223-232

Hydrochemistry in parts of the Lower Tista Floodplain in northwest Bangladesh is dominated by alkalies and weakly acid, having highest concentration of sodium cations and bicarbonate anions respectively. Groundwater is characterized by sodium-calcium and sodium-potassium cation and bicarbonate-chloride-sulphate anion facies, and genetically ‘normal chloride’, ‘normal sulphate’, and ‘normal carbonated’ type, and soft to saline. Based on electrical conductivity values, the area is divided into northern fresh and southern saline groundwater zone, and values like salinity, Na%, SAR, and RSC and a good correlation between Na⁺ and Cl^?, and Cl^? and salinity reveals increasing salinity with depth indicating a mixing of fresh and saline bodies due to marine transgression (?) during Holocene period in the Bengal delta. The rock weathering is likely to affect the groundwater quality by dolomite dissolution and calcium precipitation, representing reverse softening process and is brine seawater. Water extracted from shallow zone (from 20 to 30 m) has suitability for drinking purpose, livestock consumption and irrigation purposes, and partially suitable for industrial use, but that from deeper zone (from 30 to 50 m) is generally poor and unsuitable especially for irrigation purposes with low alkali and moderate to high salinity hazard. So groundwater can be used for irrigation in the area of fine textured soil with proper management practices.  相似文献   

Reply to the comment on “Arsenic release from biotite into a Holocene groundwater aquifer in Bangladesh” by Hossain M. Anawar and Martin Mihaljevič     

Ashraf Ali Seddique  Harue Masuda  Muneki Mitamura  Keiji Shinoda  Takamoto Okudaira  Toshiro Yamanaka  Takaaki Itai  Teruyuki Maruoka  Kenji Uesugi  Kazi Matin Ahmed 《Applied Geochemistry》2009

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Tectonostratigraphy of the Mesozoic complexes of the northwestern part of the Koryak Highland,Ust’ Belaya Mountains     

T. N. Palechek  A. V. Moiseev  I. V. Gul’pa 《Stratigraphy and Geological Correlation》2016,24(4):381-406

New data on the structure, age, and composition of the tectonostratigraphic complexes of the western part of the Koryak Highland are presented. The conclusions on the sedimentation conditions are drawn and primary relations are interpreted for most complexes. New Kimmeridgian–Tithonian and Berriasian assemblages of radiolarians are established. Campanian radiolarians are found for the first time in the region.  相似文献