Results 21 to 30 of about 109,697 (288)

بررسی اثرات الگوی رگبار و ویژگی‌های منطقه بر رسوبدهی حوزه آبخیز [PDF]

Muhandisī va mudirīyyat-i ābkhīz, 2023
مقدمهخاک یکی از مهمترین منابع طبیعی هر کشور است که نقش کلیدی در امنیت غذایی، اقتصاد ملی و کشاورزی پایدار ایفا می­‌کند. فرسایش خاک، از بارزترین عوامل هدررفت خاک است که فرسایش بارانی از شکل­‌های مهم آن است.
پریسا فتاح, خسرو حسینی, سید علی اصغر هاشمی   +2 more
doaj   +1 more source

Spatial evaluation of methane emissions in the communities of Warints and Yawi, Ecuador [PDF]

Caspian Journal of Environmental Sciences
Methane is a greenhouse gas that has caused environmental repercussions on the planet. At the national level, spatial data are unavailable, so this study aimed to estimate the amount of methane (CH4) emissions in the communities of Warints and Yawi ...
Sandra López, Juan Haro, Carla Haro, William Carrillo, Justo Moises Narvaez Brito, Burkhanov Aktam Usmanovich, Ulugbek Tulakov, Tulovov Erkinjon, Mullabayev Baxtiyarjon, Mansurov Zuxriddin Xalilillayevich   +9 more
doaj   +1 more source

Estimation of vegetation traits with kernel NDVI

ISPRS Journal of Photogrammetry and Remote Sensing, 2023
Vegetation indices computed from spectral signatures are vastly used for monitoring the terrestrial biosphere. Indices are convenient proxies for canopy structure, and leaf pigment content, and consequently to estimate the photosynthetic activity of vegetation.
Wang, Qiang, Moreno-Martínez, Álvaro, Muñoz-Marí, Jordi, Campos-Taberner, Manuel, Camps-Valls, Gustau   +4 more
openaire   +2 more sources

TLS-bridged co-prediction of tree-level multifarious stem structure variables from worldview-2 panchromatic imagery: a case study of the boreal forest [PDF]

, 2016
In forest ecosystem studies, tree stem structure variables (SSVs) proved to be an essential kind of parameters, and now simultaneously deriving SSVs of as many kinds as possible at large scales is preferred for enhancing the frontier studies on ...
Fang, Xing, Knyazikhin, Yuri, Liang, Xinlian, Lin, Yi, Sato, Hisashi, Sun, Shanlin, Wei, Tian, Yan, Lei, Yang, Bin, Zhang, Yuhu   +9 more
core   +2 more sources

NDVI relationship to monthly evaporation [PDF]

Geophysical Research Letters, 1998
Normalized difference vegetation indices (NDVI), calculated from Landsat‐MSS images, were correlated with monthly total precipitation and estimates of monthly evaporation in a prairie environment. The highest value of the correlation coefficient (r=.80) was obtained between the monthly mean NDVI and estimated evaporation of the preceding month.
J. Szilagyi, D. C. Rundquist, D. C. Gosselin, M. B. Parlange   +3 more
openaire   +1 more source

Climate Change Affected Vegetation Dynamics in the Northern Xinjiang of China: Evaluation by SPEI and NDVI

Land, 2020
Drought and vegetation dynamics in the northern Xinjiang Uygur Autonomous Region of China (NXC), the centre of Asia with arid climate, were assessed using the standardized precipitation evapotranspiration index (SPEI) and the normalized difference ...
Nana Luo, Dehua Mao, Bolong Wen, Xingtu Liu   +3 more
doaj   +1 more source

Mapping Evapotranspiration, Vegetation and Precipitation Trends in the Catchment of the Shrinking Lake Poopó

Remote Sensing, 2019
Lake Poopó is located in the Andean Mountain Range Plateau or Altiplano. A general decline in the lake water level has been observed in the last two decades, coinciding roughly with an intensification of agriculture exploitation, such as quinoa ...
Juan Torres-Batlló, Belén Martí-Cardona, Ramiro Pillco-Zolá   +2 more
doaj   +1 more source

Detection of irrigation inhomogeneities in an olive grove using the NDRE vegetation index obtained from UAV images [PDF]

, 2019
We have developed a simple photogrammetric method to identify heterogeneous areas of irrigated olive groves and vineyard crops using a commercial multispectral camera mounted on an unmanned aerial vehicle (UAV).
Jorge Sánchez, Juan, Soler, José Alberto, Vallbé Mumbrú, Marc   +2 more
core   +2 more sources

A GIS Assessment of the Green Space Percentage in a Big Industrial City (Dnipro, Ukraine)

Ekológia (Bratislava), 2023
Green spaces in an industrially polluted city are extremely important for the physical activity and mental health of its inhabitants. The study aim was to analyze the urban green space dynamics and the greening degree of different functional zones ...
Buchavyi Yuriy, Lovynska Viktoriia, Samarska Alla   +2 more
doaj   +1 more source

Analysis of urban growth effects on Land Surface Temperature (LST) increase using GIS: A case study of Chelghoum El Aïd city (1984-2024) [PDF]

Glasnik Srpskog Geografskog Društva
The city of Chelghoum El Aïd has experienced rapid urban growth, primarily driven by a major urbanization event. This expansion has prioritized the development of natural and undeveloped spaces, rather than investing in urban infrastructure.
Zaari Achouak, Djeffal Djafar
doaj   +1 more source