scholarly journals Analyzing the Role of Shallow Groundwater Systems in the Water Use of Different Land-Use Types in Arid Irrigated Regions

Water ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 634 ◽  
Author(s):  
Dongyang Ren ◽  
Xu Xu ◽  
Quanzhong Huang ◽  
Zailin Huo ◽  
Yunwu Xiong ◽  
...  
Keyword(s):  
Land Use ◽  
Water Use ◽  
Shallow Groundwater ◽  
Land Use Types ◽  
Groundwater Systems

scholarly journals The Role of Land Use Types and Water Chemical Properties in Structuring the Microbiomes of a Connected Lake System

2020 ◽  
Vol 11 ◽  
Author(s):  
Sophi Marmen ◽  
Lior Blank ◽  
Ashraf Al-Ashhab ◽  
Assaf Malik ◽  
Lars Ganzert ◽  
...  
Keyword(s):  
Land Use ◽  
Chemical Properties ◽  
Lake System ◽  
Land Use Types

scholarly journals A signature-based approach to quantify soil moisture dynamics under contrasting land-uses

2021 ◽  
Author(s):  
Ryoko Araki ◽  
Flora Branger ◽  
Inge Wiekenkamp ◽  
Hilary McMillan
Keyword(s):  
Land Use ◽  
Time Series ◽  
Soil Moisture ◽  
Shallow Groundwater ◽  
Storm Event ◽  
Land Uses ◽  
Soil Moisture Dynamics ◽  
Land Use Types ◽  
Event Based ◽  
Moisture Dynamics

Soil moisture signatures provide a promising solution to overcome the difficulty of evaluating soil moisture dynamics in hydrologic models. Soil moisture signatures are metrics that represent catchment dynamics extracted from time series of data and enable process-based model evaluations. To date, soil moisture signatures have been tested only under limited land-use types. In this study, we explore soil moisture signatures’ ability to discriminate different dynamics among contrasting land-uses. We applied a set of nine soil moisture signatures to datasets from six in-situ soil moisture networks worldwide. The dataset covers a range of land-use types, including forested and deforested areas, shallow groundwater areas, wetlands, housing areas, grazed areas, and cropland areas. These signatures characterize soil moisture dynamics at three temporal scales: event, seasonal, and time-series scales. Statistical and visual assessment of extracted signatures showed that (1) storm event-based signatures can distinguish different dynamics for most land-uses, (2) season-based signatures are useful to distinguish different dynamics for some types of land-uses (forested vs. deforested area, greenspace vs. housing area, and deep vs. shallow groundwater area), (3) timeseries-based signatures can distinguish different dynamics for some types of land-uses (forested vs. deforested area, deep vs. shallow groundwater area, non-wetland vs. wetland area, and ungrazed vs. grazed area). We compared signature-based process interpretations against literature knowledge: event-based and time series-based signatures were generally matched well with previous process understandings from literature, but season-based signatures did not. This study demonstrates the best practices of extracting soil moisture signatures under various land-use and climate environments and applying signatures for model evaluations.

scholarly journals Aboveground Biomass Distribution in a Multi-Use Savannah Landscape in Southeastern Kenya: Impact of Land Use and Fences

Land ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 381
Author(s):  
Edward Amara ◽  
Hari Adhikari ◽  
Janne Heiskanen ◽  
Mika Siljander ◽  
Martha Munyao ◽  
...  
Keyword(s):  
Land Use ◽  
Aboveground Biomass ◽  
Laser Scanning ◽  
Wildlife Conservation ◽  
Vital Role ◽  
Google Earth ◽  
Conservation Area ◽  
Land Use Types ◽  
Land Cover Map

Savannahs provide valuable ecosystem services and contribute to continental and global carbon budgets. In addition, savannahs exhibit multiple land uses, e.g., wildlife conservation, pastoralism, and crop farming. Despite their importance, the effect of land use on woody aboveground biomass (AGB) in savannahs is understudied. Furthermore, fences used to reduce human–wildlife conflicts may affect AGB patterns. We assessed AGB densities and patterns, and the effect of land use and fences on AGB in a multi-use savannah landscape in southeastern Kenya. AGB was assessed with field survey and airborne laser scanning (ALS) data, and a land cover map was developed using Sentinel-2 satellite images in Google Earth Engine. The highest woody AGB was found in riverine forest in a conservation area and in bushland outside the conservation area. The highest mean AGB density occurred in the non-conservation area with mixed bushland and cropland (8.9 Mg·ha−1), while the lowest AGB density (2.6 Mg·ha−1) occurred in overgrazed grassland in the conservation area. The largest differences in AGB distributions were observed in the fenced boundaries between the conservation and other land-use types. Our results provide evidence that conservation and fences can create sharp AGB transitions and lead to reduced AGB stocks, which is a vital role of savannahs as part of carbon sequestration.

scholarly journals Characterizing shallow groundwater contamination depending on different land use types

Episodes ◽  
2022 ◽  
Author(s):  
Chung-Mo Lee ◽  
Yongcheol Kim ◽  
MoonSu Kim ◽  
Hyun-Koo Kim ◽  
Se-Yeong Hamm
Keyword(s):  
Land Use ◽  
Groundwater Contamination ◽  
Shallow Groundwater ◽  
Land Use Types

scholarly journals Analysis of the Spatial Relationship between Cattle and Wild Ungulates across Different Land-Use Systems in a Tropical Savanna Landscape

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Geoffrey W. Kinga ◽  
John Mironga ◽  
Wilfred O. Odadi
Keyword(s):  
Land Use ◽  
Feeding Habits ◽  
Spatial Relationship ◽  
Distribution Data ◽  
Spatial Relationships ◽  
Wild Ungulates ◽  
Land Use Systems ◽  
Land Use Types ◽  
Body Sizes

In many African savanna landscapes, domestic and wild herbivores cooccur across different land-use systems, but the role of land-use in shaping their spatial relationship is poorly understood. We evaluated the spatial relationship between cattle and wild herbivores categorized by body sizes and feeding habits across different land-use types, namely, private ranches (PR), transitional lands (TRL), and pastoral grazing areas (PGA), in Laikipia County, Kenya. Cattle and wild herbivores spatial distribution data were obtained from Kenya’s Department of Resources Survey and Remote Sensing (DRSRS). Spatial relationships between cattle and different wild herbivore guilds were analyzed using Ripley’s bivariateK12function. In PR, wild herbivore guilds showed significant attraction to cattle at short distances. In TRL, wild grazers, mixed feeders, megaherbivores, and medium-sized ungulates exhibited significant attraction to cattle. Additionally, repulsion was observed between cattle and browsers at short distances under this land-use system. In PGA, wild grazers, mixed feeders, and megaherbivores repelled strongly with cattle at short distances while browsers and medium-sized ungulates were significantly attracted to cattle. Cattle and wild herbivores were more randomly and independently distributed in PR than in TRL and PGA. These spatial relationships imply better coexistence between cattle and wild herbivores in PR than in TRL and PGA.

scholarly journals Spatial modeling on land use change in regional scale of Java Island based-on biophysical characteristics

2020 ◽  
Vol 10 (3) ◽  
pp. 511-523
Author(s):  
Yudi Setiawan ◽  
Kunihiko Yoshino
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Spatial Modeling ◽  
Paddy Rice ◽  
Positive Contribution ◽  
Future Role ◽  
Land Use Types ◽  
The Future ◽  
Intensive Cropping

This study discusses biophysical-based spatial modeling for land-use change in Java Island considering neighborhood interactions between land use types and the changing area. These neighborhood characteristics used in the logistic regression model to estimate the probability of the change events occurrence. Moreover, the future role of land-use change is then projected using the Markov model based on the annual land-use changes map. The results indicate that paddy rice with an irrigation system (double cropping), especially in upland areas has a high positive spatial autocorrelation with the change areas. Residential area, paddy rice, and upland with intensive cropping have a high effect on the probability of change occurrence. Meanwhile, barren lands/dry land, bush-shrub, and mixed garden give a negative correlation to the change occurrences in agricultural lands. In the case of forestland, the results show some land-use types such as upland with intensive cropping and plantation have a positive contribution to the change of land. The accuracy of the model has also assessed through comparison of the projection with the actual area. The results indicate that the future role of each land-use type is different based on the trend period predictor in the model.

scholarly journals A signature-based approach to quantify soil moisture dynamics under contrasting land-uses

2021 ◽  
Author(s):  
Ryoko Araki ◽  
Flora Branger ◽  
Inge Wiekenkamp ◽  
Hilary McMillan
Keyword(s):  
Land Use ◽  
Soil Moisture ◽  
Urban Areas ◽  
Shallow Groundwater ◽  
Land Uses ◽  
Catchment Scale ◽  
Soil Moisture Dynamics ◽  
Land Use Types ◽  
Event Based ◽  
Moisture Dynamics

Soil moisture signatures provide a promising solution to overcome the difficulty of evaluating soil moisture dynamics in hydrologic models. Soil moisture signatures are metrics that quantify the dynamic aspects of soil moisture timeseries and enable process-based model evaluations. To date, soil moisture signatures have been tested only under limited land-use types. In this study, we explore soil moisture signatures’ ability to discriminate different dynamics among contrasting land-uses. We applied a set of nine soil moisture signatures to datasets from six in-situ soil moisture networks worldwide. The dataset covered a range of land-use types, including forested and deforested areas, shallow groundwater areas, wetlands, urban areas, grazed areas, and cropland areas. Our set of signatures characterized soil moisture dynamics at three temporal scales: event, season, and a complete timeseries. Statistical assessment of extracted signatures showed that (1) event-based signatures can distinguish different dynamics for all the land-uses, (2) season-based signatures can distinguish different dynamics for some types of land-uses (deforested vs. forested, urban vs. greenspace, and cropped vs. grazed vs. grassland contrasts), (3) timeseries-based signatures can distinguish different dynamics for some types of land-uses (deforested vs. forested, urban vs. greenspace, shallow vs. deep groundwater, wetland vs. non-wetland, and cropped vs. grazed vs. grassland contrasts). Further, we compared signature-based process interpretations against literature knowledge; event-based and timeseries-based signatures generally matched well with previous process understandings from literature, but season-based signatures did not. This study will be a useful guideline for understanding how catchment-scale soil moisture dynamics in various land-uses can be described using a standardized set of hydrologically relevant metrics.

LAND USE TYPES AND SOIL CHARACTERISTICTS: A CASE STUDY IN HUONG VINH COMMUNE, HUONG TRA TOWN, THUA THIEN HUE PROVINCE

2017 ◽  
Vol 126 (4B) ◽  
Author(s):  
Trần Thanh Đức
Keyword(s):  
Land Use ◽  
Sweet Potato ◽  
Soil Analysis ◽  
Soil Characteristics ◽  
Low Ph ◽  
Clay Loam ◽  
Total N ◽  
Land Use Types ◽  
Total P

This research carried out in Huong Vinh commune, Huong Tra town, Thua Thien Hue province aimed to identify types of land use and soil characteristics. Results showed that five crops are found in Huong Vinh commune including rice, peanut, sweet potato, cassava and vegetable. There are two major soil orders with four soil suborders classified by FAO in Huong Vinh commune including Fluvisols (Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols) and Arenosols (Haplic Arenosols). The results from soil analysis showed that three soil suborders including Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols belonging to Fluvisols were clay loam in texture, low pH, low in OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O. Meanwhile, the Haplic Arenosols was loamy sand in texture, poor capacity to hold OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O

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