Tài liệu miễn phí Địa Lý

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Lecture River geometry and mechanics

River geometry and mechanics. After studying this section will help you understand hydrology and hydraulics; extreme river floods; climate change impact on rivers; river geometry and flow pulses downstream of reservoirs...

4/6/2023 10:52:12 PM +00:00

Lecture Mudflows and debris flows

Lecture Mudflows and debris flows. After studying this section will help you understand landslides in the himalayas; duksan creek in south Korea; san julian in Venezuela; sediment plugs in new Mexico; rheology and countermeasure design...

4/6/2023 10:52:00 PM +00:00

Lecture Sediment mechanics

Lecture Sediment mechanics. After studying this section will help you understand brief overview of examples and techniques: fall velocity, turbulent velocity profiles, incipient motion, bedforms...

4/6/2023 10:51:48 PM +00:00

Lecture Watershed processes and modeling

Lecture Watershed processes and modeling After studying this section will help you understand brief overview of catchment modeling and trap efficiency of reservoirs: Upland Erosion Modeling; Dynamic Watershed Modeling; Modeling of Naesung Stream, South Korea...

4/6/2023 10:51:38 PM +00:00

Tiềm năng và triển vọng trong khảo cổ học - Biển đảo Việt Nam: Phần 1

Tài liệu Khảo cổ học biển đảo Việt Nam - Tiềm năng và triển vọng phần 1 trình bày quá trình chiếm lĩnh và khai thác các vùng biển đảo Việt Nam; Tư liệu khảo cổ học góp phần khẳng định chủ quyền của Việt Nam ở Hoàng Sa và Trường Sa; Những phát hiện về di cốt người cổ trên đảo và ven bờ biển Việt Nam;... Mời các bạn cùng tham khảo để nắm nội dung chi tiết.

4/6/2023 8:25:16 PM +00:00

Thực trạng thiết kế và sử dụng đồ dùng dạy học địa lí trung học phổ thông từ rác thải trường học trên địa bàn thành phố Cần Thơ

Trong bài viết này, nhóm tác giả sử dụng kết hợp các phương pháp nghiên cứu lí thuyết và thực tế để phân loại và xây dựng tiêu chí đánh giá đồ dùng dạy học (ĐDDH) Địa lí, tìm hiểu thực trạng sử dụng và thiết kế ĐDDH Địa lí từ rác thải tại các trường trung học phổ thông (THPT) trên địa bàn Quận Ninh Kiều và Bình Thủy của Thành phố Cần Thơ.

4/6/2023 2:29:10 PM +00:00

Ứng dụng GIS và viễn thám ước lượng tổng tiềm năng hấp thụ CO2 từ thảm thực vật thành phố Hồ Chí Minh

Nghiên cứu này được thực hiện trên cơ sở ứng dụng GIS và viễn thám để tạo ra bản đồ tổng thể tiềm năng hấp thụ CO2 của thực vật thay vì phải trực tiếp đo đếm sinh khối. Từ các dữ liệu thu thập tiến hành xử lý ảnh viễn thám, tính toán giá trị NDVI, thực hiện giải đoán ảnh vệ tinh kết hợp kiểm tra độ chính xác bằng Google map.

4/6/2023 2:22:52 PM +00:00

Đánh giá tài nguyên nước dưới đất trong các thành tạo bở rời thung lũng Mường Thanh bằng phương pháp mô hình số

Nghiên cứu khảo sát địa chất thủy văn, quan trắc động thái nước dưới đất cho thấy, nước dưới đất trong các thành tạo này được hình thành chủ yếu từ: i) Nguồn nước mưa, ii) Nước sông Nậm Rốm và iii) Một tỷ lệ nhỏ nước dưới đất thấm từ bên rìa. Tiềm năng tài nguyên nước trong các thành tạo bở rời thung lũng Mường Thanh được tính toán bằng phương pháp mô hình số.

4/6/2023 1:53:22 PM +00:00

Đánh giá khả năng hình thành bùn hạt hiếu khí trên mô hình công nghệ SBR trong phòng thí nghiệm

Nghiên cứu này trình bày kết quả quá trình hình thành và phát triển của bùn hạt hiếu khí trong điều kiện phòng thí nghiệm với chất nền là acetate, bùn hoạt tính dùng để nuôi cấy được lấy từ Trạm xử lý nước thải (XLNT) Yên Sở (Hà Nội) có MLSS 900-1200 mg/l. Mời các bạn tham khảo!

4/6/2023 1:52:42 PM +00:00

Địa danh tỉnh Sóc Trăng dưới góc nhìn dân tộc học

Bài viết giới thiệu một số địa danh tỉnh Sóc Trăng dưới điểm nhìn dân tộc học. Trong đó, yếu tố địa danh không chỉ góp phần phản ánh sự hình thành dân cư trên địa bàn mà còn thể hiện những vấn đề về tín ngưỡng, tôn giáo, tâm lí,...

4/6/2023 12:04:22 PM +00:00

Phương thức định danh của địa danh tỉnh Sóc Trăng

Bài viết giới thiệu đến bạn đọc những nguyên tắc định danh nói chung và một số đặc điểm định danh của ở tỉnh Sóc Trăng nói riêng, cụ thể có hai dạng: Phương thức tự tạo và phương thức chuyển hóa. Phương thức tự tạo là phương thức cơ bản nhất của địa danh, được hình thành từ sự tri nhận, cảm quan của con người về thế giới vật chất nói chung, trải qua quá trình lịch sử lâu dài đã hình thành nên phương thức thứ hai – phương thức chuyển hóa: Chuyển địa danh này thành một hay nhiều địa danh khác.

4/6/2023 12:01:06 PM +00:00

Kết hợp sơ đồ tư duy và thảo luận nhóm trong dạy học Địa lí ở trường Đại học Tây Bắc

Thảo luận nhóm là một phương pháp đáp ứng quan điểm dạy học lấy người học làm trung tâm. Sơ đồ tư duy là một trong những công cụ đắc lực để xác định, lựa chọn ý tưởng cũng như những vấn đề cần giải quyết.

4/6/2023 11:53:28 AM +00:00

Tectonic and structural characteristics of Erzurum and its surroundings (Eastern Turkey): a detailed comparison between different geophysical parameters

The tectonic and structural properties of Erzurum and its surroundings have been investigated by evaluating the seismotectonic b - value, magnetic anomaly, edge detection analysis (total horizontal derivative (THDR) and tilt angle (TA)), Curie Point Depth (CPD), P-wave velocity (Vp), and Vp / Vs (S - wave velocity) ratio and by imaging the regional distributions of these parameters. For this purpose, all parameters have been combined to be able to reveal the new useful results on the study region and are presented for different locations and depths. The Vp values have been accompanied by high Vp / Vs ratios and shallow CPD values in the areas with geothermal regions such as Tekman, Söylemez, and the northern part of Karlıova.

4/6/2023 9:00:20 AM +00:00

Middle–Late Devonian boundary conodonts from Anarak and Sar-Ashk sections, central Iran

The Middle/Late Devonian boundary is investigated based on twenty-four conodont species and subspecies from the Anarak and Sar-Ashk sections in the northwest and southeast of Central East Iran Microplate. The earliest Frasnian strata are defined by the first appearance of Ancyrodella rotundiloba pristina and can be correlated with the global stratotype in the Montagne Noir, South of France. The Late Givetian – Early Frasnian carbonates of the Bahram Formation in the Sar-Ashk section transgressively overlie the sandstones of the Padeha Formation, whereas the coeval interval in the Anarak section composes the middle part of the Bahram Formation.

4/6/2023 9:00:08 AM +00:00

Mineralogical and paleobotanical investigations of Oligo-Miocene petrified wood from the southwest of Thrace Basin (NW Turkey)

Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections. The mineralogicalpetrographic-botanical studies were carried out under a polarizing and botanical microscope. Opal-moganite-chalcedony-quartz, which are different polymorphs of silica, were detected under the microscope in the petrified wood.

4/6/2023 8:59:55 AM +00:00

Structural interpretation and petrophysical approach for subsurface fracture identification of Joya Mair area, NW-Himalayas, Pakistan

Identification of fracture zone is a challenging task without the image log data. There are many brownfields around the world where the image log has not been acquired; therefore, there must be an alternative way of fracture identification. In this paper, a conventional log response technique for fracture delineation has been discussed. The study area lies in the Upper Indus Basin of Pakistan, which is sub-divided into the Kohat and Potwar basins. Minwal-X-1 of Joya Mair area, which lies in the Potwar Basin, is selected for this purpose. Eocene limestone units are formed due to fracture porosity.

4/6/2023 8:59:35 AM +00:00

Determination of recent tectonic deformations along the Tuz Gölü Fault Zone in Central Anatolia (Turkey) with GNSS observations

The morphotectonic features of the TGFZ and the distribution of the epicenters of earthquakes over magnitude 5.0 show that this fault zone remains active today. In this study, the deformation of the TGFZ is determined with high sensitivity using geodetic measurements. To obtain accurate information about the deformation of the TGFZ, 24 GNSS sites and two continuously operating reference stations were constructed in the southern part of the TGFZ. Between 2018 and 2020, Global Navigation Satellite Systems (GNSS) measurements were made on this network. The data of the Turkish National Fundamental GPS Network (TNFGN) and the continuously operating reference stations-Turkey (CORS-TR) sites around the study area were also included in the study, and GNSS measurements were evaluated with the GAMIT/GLOBK software, and velocity fields of the region were determined.

4/6/2023 8:59:27 AM +00:00

Exploring the untapped gas potential of Ghazij shale in Pirkoh area, Pakistan: Integrated approach of attribute analysis and maturity modeling

A correlative maturity study integrated with seismic attributes for determining the shale gas potential of Ghazij Formation is carried out. Analysis of post-stack seismic attributes has been frequently used to identify areas of high exploration potential within shale resource plays. Seismic and well data have been utilized for the analysis of maturity trends in the shale facies of Ghazij Formation. Total organic carbon content (TOC), burial history, Vitrinite Reflectance (Ro), thermal history and porosity values have been computed at Pirkoh-01 well, which are laterally compared with the maturity results in Bambor and Sui areas. In addition, analysis is carried out to detect the bright spots using the seismic attributes, which depicts positive results for the presence of the sweet spots around 1100–1350 ms in the southern synclinal part of the study area.

4/6/2023 8:59:19 AM +00:00

Lithium extraction from geothermal waters; a case study of Ömer-Gecek (Afyonkarahisar) geothermal area

Lithium (Li) is the lightest metal, has unique physicochemical properties and is the main component of lithium-ion batteries. Rechargeable lithium-ion batteries play a very important role in maximizing the performance of electric devices and vehicles. It is predicted that the metal and mineral demand for lithium-ion batteries will increase 56 times by 2050. In order to meet the increasing demand, in addition to known methods, lithium recovery from geothermal waters has become a very popular research subject. There are abundant geothermal water resources in the world, especially in Turkey and in Afyonkarahisar.

4/6/2023 8:59:10 AM +00:00

Grey water footprint assessment of geothermal water resources in the southeastern Anatolia region

This paper aimed to determine the grey water footprint (GWF) of geothermal water resources and to investigate the effect of biochar adsorption on grey water footprint in Southeastern Turkey. In this paper, GWF has been calculated in terms of iron (Fe), arsenic (As), manganese (Mn), boron (B), and chrome (Cr) concentrations for fifteen observation geothermal resources located in Southeastern Anatolia Region. In this study, a new approach based on the GWF was developed in order to determine the geothermal water pollution. Grey water footprints related to fifteen geothermal resources were investigated. In the second stage of the study, the effect of biochar adsorption on GWF was estimated using Monte Carlo simulation.

4/6/2023 8:59:03 AM +00:00

Use of geothermal fluid for agricultural irrigation: preliminary studies in BalçovaNarlıdere Geothermal Field (Turkey)

Balçova-Narlıdere Geothermal Field (BNGF) hosts the largest geothermal district heating system of Turkey and several geothermal wells used for district heating and thermal tourism activities. This study assesses the use of BNGF geothermal fluid for agricultural activities. The spent geothermal brine was treated using nanofiltration and reverse osmosis membranes on a pilot-scale membrane test system. The qualities of the product were evaluated in terms of agricultural irrigation integrated with the implemented innovative wireless sensor network.

4/6/2023 8:58:55 AM +00:00

Use of geothermal resources in Konya Plain Project (KOP) Region for tourism, health purposes, agricultural, industrial and distict heating

This study has been prepared in accordance with the objectives of evaluating and developing geothermal resources in order to bring the geothermal resources in the Konya Plain Project (KOP) Region, which includes Aksaray, Kırşehir, Konya, Nevşehir, Niğde and Yozgat provinces, to the country’s economy with maximum capacity, and to develop proposals for investments to be made. The number of overnight stays and the number of tourists outside the region should be increased by utilizing alternative tourism opportunities in the region. Their use in terms of geothermal energy, tourism and health has an important investment and income potential for the region.

4/6/2023 8:58:47 AM +00:00

Simulation and parametric study on a novel modified Kalina cycle

To improve the utilization rate of hot dry rock resources, it is necessary to recover the energy of geothermal tailwater and improve the net output work. An improved ammonia-water power cycle is proposed based on the Kalina cycle. Taking the geothermal parameters of the Husavik Power Plant in Iceland as the prototype (the water temperature of the geothermal well is 122°C, and the tailwater temperature is 80°C), the numerical simulation of the modified Kalina cycle is carried out by using Engineering Equation Solver software.

4/6/2023 8:58:40 AM +00:00

Exploration of geothermal potential using integrated fuzzy logic and analytic hierarchy process (AHP) in Ağrı, Eastern Turkey

The demand for energy is increasing day by day worldwide due to population growth, industrialization and rising living standards. Geothermal energy, one of the alternative energy sources, is preferred in terms of providing environmentally friendly, quality and regular energy. Our country is rich in geothermal resource potential. However, there are still many unexplored geothermal resources. In this study, fuzzy-AHP method was used to determine the geothermal potential of Ağrı province. Five criteria such as geological formations, hot / mineral springs, lineaments, land surface temperature and hydrothermal alteration zones were evaluated to determine the having geothermal potential.

4/6/2023 8:58:28 AM +00:00

Hydrogeochemical and isotopic monitoring of the Kestanbol geothermal field (Northwestern Turkey) and its relationship with seismic activity

Kestanbol geothermal field is located in northwestern Turkey and is one of the highest temperature geothermal fields in the Biga Peninsula. In this study, one geothermal well, two geothermal springs, and two cold springs were monitored for one year in Kestanbol geothermal field to determine hydrogeochemical and isotopic characteristics. Additionally, any possible relationship between seismic activity and variations in the hydrochemistry of geothermal water was investigated. The Kestanbol geothermal field is controlled mainly by the right-lateral strike-slip Kaplıca fault with normal components. The distribution of the geothermal waters is roughly parallel to the fault.

4/6/2023 8:58:20 AM +00:00

Numerical modeling of fluid flow and heat transfer in Kurşunlu geothermal field-KGF (Salihli, Manisa/Turkey)

Nowadays, the need for energy is increasing more and more. It is more difficult to acquire new resources in various fields than to preserve existing energy resources. Although Turkey is a very rich state in terms of various energy resources, misuse of these resources can even lead to conflicts that may occur between the states in forthcoming years. In today’s economic conditions, we can only protect our energy resources with the correct way of management. In this context, it is very important to reveal the mechanisms that make up the geothermal systems, which are very common in Western Anatolia.

4/6/2023 8:58:10 AM +00:00

Structural controls and hydrogeochemical properties of geothermal fields in the Varto region, East Anatolia

Varto and the surrounding region have important geothermal fields, developing in strike-slip tectonic setting in East Anatolia, which resulted from the collision of the Arabian and Eurasian plates. The main structural elements in the area are the NE-trending sinistral and NW-trending dextral strike-slip fault segments and N-S trending extension zones. In order to determine fault-controlled geothermal circulation, it is very important to fully characterize the structural elements in these complex environments. The widely distributed volcanic rocks have fracture and crack systems that play an important role in surface infiltration, geothermal fluid, and groundwater circulation.

4/6/2023 8:57:52 AM +00:00

Seismic velocity characterisation and survey design to assess CO2 injection performance at Kızıldere geothermal field

The noncondensable gases in most geothermal resources include CO2 and smaller amounts of other gases. Currently, the worldwide geothermal power is a small sector within the energy industry, and CO2 emissions related to the utilisation of geothermal resources are consequently small. In some countries, however, such as Turkey and Iceland, geothermal energy production contributes significantly to their energy budget, and their CO2 emissions are relatively significant. SUCCEED is a targeted innovation and research project, which aims to investigate the reinjection of CO2 produced at geothermal power production sites and develop, test, and demonstrate at field scale innovative measurement, monitoring and verification (MMV) technologies that can be used in most CO2 geological storage projects.

4/6/2023 8:57:41 AM +00:00

Harcourt granite scCO2 water interaction: a laboratory study of reactivity and modelling of hydrogeochemical processes

Batch-type laboratory reactivity experiments and mo delling of hydrogeochemical interactions of a granite-scCO2-water system were conducted at 100 °C and 10 MPa in order to evaluate the geochemical and mineralogical responses of the granite to long-term reaction. The laboratory reactivity tests were conducted for a to t l duration of 70 days, and the continued hydrogeochemical interactions for up to 210 days we re determined by geochemical simulations. The reacted granite powder and the res idual solutions were subjected to several analytical techniques, including inductively-couple d plasma optical emission spectrometry (ICP-OES), X-ray diffraction (XRD), scanning electr on microscopy (SEM) and pH measurements, in order to characterise the mineralo gic l interactions.

4/6/2023 8:57:32 AM +00:00

High heat generating granites of Kestanbol: future enhanced geothermal system (EGS) province in western Anatolia

Although the western Anatolian region is a foci for hydrothermal systems, this region has several high heat-generating granitic intrusive bodies that qualify to be candidates for enhanced geothermal systems (EGS). Considering the future energy requirement, carbon dioxide emissions reduction strategies, food, and water security issues, these granites appear to be the future clean energy source for the country. One such granite intrusive is located in the Kestanbol area in the western Anatolian region.

4/6/2023 8:57:24 AM +00:00