Owning to the nature of flood events, near-real-time detection and mapping is essential for disaster prevention, relief, mitigation. In recent years, rapid advancement deep learning has brought endless possibilities field detection. However, relies heavily on training samples availability high-quality datasets rather limited. The present study collected 16 events in Yangtze River Basin divided them into three categories different purpose: training, testing, application. An efficient...

The Naoli River Basin (NRB), a pivotal agricultural production area in China, is poised to undergo substantial impacts on water resources due projected climate and land use/cover (LULC) changes. Despite its significance the context of China's expanding farmland construction NRB, there exists limited research potential repercussions future shifts runoff, soil content (SWC), evapotranspiration (ET) crop productivity availability (both terms quantity timing). This study employs LULC maps an...

After several decades of aeromagnetic surveys, the measured data now cover nearly entire Chinese continent and part China Sea. These were first applied in this research could provide important insights into distribution igneous rocks beneath earth's surface. Because different types have a magnetic difference produce distinct anomalies on ΔT image with reduction to pole or other calculating maps. By analyzing more than 240 thousand susceptibility points known continent, it was determined that...

Abstract Based on the latest compiled 1/100 million aeromagnetic map data, Curie point depth was estimated by power spectrum method. The calculation obtained 8004 values in Chinese continent. Eventually, we completely continental isotherm map. This first fully shows characteristics of depth. study that is characterized depression inside stable blocks with 28∼45 km, such as Tarim Basin, Junggar Qaidam Hoh Xil‐Bayan Har Depression area, Yangtze Basin North China basin Songliao Erlian...

Atmospheric ozone plays a pivotal role in Earth's climate system, influencing solar radiation absorption the stratosphere and regulating ultraviolet light reaching surface. Accurate monitoring of concentration is crucial for environmental assessments, air quality monitoring, change studies. The Ozone Monitoring Instrument (OMI) Sentinel-5 Precursor TROPOspheric (TROPOMI) provide valuable data such monitoring. While OMI offers long record since 2004, but its effectiveness hindered by...

An in-situ gamma-ray spectrometer survey with a scintillation detector of NaI(Tl) (Φ75 mm × 75 mm) was carried out in the Baotou and Bayan Obo Districts order to estimate levels natural radionuclides near rare-earth (RE) tailings dams. In RE dam Baotou, mean concentrations 238U 232Th were 3.0 ± 1.0 mg/kg (range: 1.9–4.6 mg/kg) 321 31 294–355 mg/kg), respectively. dam, 5.7 0.5 5.3–6.1 276 275.5–276.3 The average mining areas Mine living Town 18.7 7.5 26.2 9.1 mg/kg, concentration recorded...

Abstract In order to quantitatively evaluate the performance index of airborne gravity system, repeated flight lines are usually used test coherence dynamic survey gravimeter. However, there is no corresponding criterion in current code quality repeat line data survey. We research and summarize a method RMS (root mean square) accuracy calculation for lines. Based on results internal external accord accuracy, we can objectively working status instrument.

Since polymetallic ores show higher anomalies in gravity exploration methods, we usually obtain the position and range of ore bodies by density inversion data. The three-dimensional (3D) focusing is a common interpretation method mineral exploration, which can directly quantitatively distribution subsurface targets. However, actual cases, it computation inefficient. We proposed preconditioned Jacobian-free Newton-Krylov (JFNK) to accomplish inversion. JFNK an efficient algorithm solving...

The West Qinling Orogenic Belt (WQOB) in central China records the tectonic evolution and deep geodynamics process associated with plate collision on northeastern margin of Qinghai–Tibet Plateau. study deep–seated structure is beneficial for revealing crust during continental orogeny, also has significance mineral exploration. In this study, crustal distribution major faults Orogen are calculated by processing geophysical aeromagnetic ground gravity data. density magnetic susceptibility...

Obtaining high-quality precipitation data with both high spatial and temporal resolution is imperative for hydrological meteorological research. However, the coarse uncertain quality of most satellite data, coupled sparse rain gauge station (RGS), limit their direct applicability in scientific Downscaling particularly conjunction RGS, proves to be an effective approach overcome this challenge. In study, we utilize geographically weighted regression kriging model downscale global measurement...

An environmental radioactivity survey by Airborne Gamma-ray Spectrometry (AGS) on a large scale was undertaken in Zhuhai Zone (ZZ) and Shenzhen (SZ), which include major cities southern China, covering areas of 3800 km2 4660 km2, respectively. The estimated dose rates AGS have been compared with observed results ionization chamber portable dosemeter. Maps the terrestrial rate at 1m above ground level calculated based data AGS. mean are 84.37 ± 51.69 82.10 32.98 nGy/h ZZ SZ, maximum 343.11...

In the Qihe area, magnetic anomalies caused by deep and concealed magnetite are weak compared with ground surveys, airborne surveys further weaken signals. Moreover, in area belongs to a contact-metasomatic deposit, its mother rock overlap interweave. Therefore, it is difficult directly delineate target areas of according measured aeromagnetic maps or similar areas, let alone estimate prospective resources. This study tried extract magnetite-caused from data using high-pass filtering. Then,...

A newly discovered Devonian ophiolite located in the Taoxinghu area of central Qiangtang on Qinhai–Tibet Plateau is described. The consists gabbro and diabasic dikes, invasive cumulate gabbros-leucogabbros. has undergone greenschist facies metamorphism minor deformation. Dating metagabbro by laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) zircon U–Pb techniques yielded a weighted mean age 367.2 ± 3.3 Ma (Late Devonian). Whole-rock geochemical analyses show that rocks...

The paper focuses on the nature and distribution of Paleozoic Mesozoic marine strata South Yellow Sea. depths to magnetic basement (bottom strata) Indosinian suture (top strata), hence gross thickness sediments, are calculated interpreted for first time using latest high-resolution aeromagnetic airborne gravity data in residual is suspected be greatly influenced by uplift denudation induced orogeny. preliminary subdivision tectonic units conducted. Middle Depression Southern have high...

The accuracy of the airborne vector magnetic (VM) survey mainly depends on attitude measurement precision aircraft. An orientation change 0.001° can produce an error approximately 1 nT in VM components for a geomagnetic field 50,000 nT. Therefore, noise estimation or accurate understanding characteristics measured data plays important role geophysical applications. A new system with high-precision (0.003°–0.007° root-mean square [rms]) prospecting was developed. We have analyzed results from...

The Qinghai-Tibet Plateau (also referred to as the Plateau) has long received much attention from community of geoscience due its unique geographical location and rich mineral resources. This paper reviews aeromagnetic surveys in past 60 years summarizes relevant research achievements, which mainly include followings. (1) boundaries between surrounding regions have been clarified. In detail, western boundary is restricted by West Kunlun-Altyn Tagh arc-shaped magnetic anomaly zone forming...