scholarly journals A participatory GIS approach to identify critical land degradation areas and prioritize soil conservation for mountainous olive groves (case study)

2014 ◽  
Vol 11 (3) ◽  
pp. 782-791 ◽  
Author(s):  
Ahmed Al-Wadaey ◽  
Feras Ziadat
Keyword(s):  
Land Degradation ◽  
Soil Conservation ◽  
Participatory Gis ◽  
Olive Groves

Land degradation and soil conservation in the Barlad Plateau, Romania: a case study from Racova catchment

2020 ◽  
Author(s):  
Lilian Niacsu ◽  
Ion Ionita ◽  
Claudia Samoila ◽  
Georgel Grigoras ◽  
Ana-Maria Belebea-Apostu
Keyword(s):  
Land Degradation ◽  
Soil Conservation ◽  
Farming System ◽  
Mean Value ◽  
Environmental Threat ◽  
Conservation Measures ◽  
The Mean ◽  
Landslide Distribution ◽  
Soil Conservation Measures

<p>Land degradation by soil erosion, gullying, landslides and reservoir sedimentation is a major environmental threat in the Barlad Plateau of Romania. This paper reviews both land degradation and the development of soil conservation measures in a representative 32,908 ha catchment. Previous studies focused on larger regional areas and provided insufficient detailed information about land degradation and land improvements. Results estimated the mean value of soil loses at 22.7 t ha-1 y-1 based mostly on the USLE. Gully erosion is very limited in extent (covering 3% of the catchment area), but has considerable impacts in terms of sediment production and triggering or reactivating landslides. The 1:5,000 scale landslide distribution map shows that 56% of Racova Catchment is covered by landslides, in any shape or age. Most of them are shallow seated and inactive landslides. Traditional agriculture in the Barlad Plateau focused on ‘up-and-down slope’ farming on small plots. Soil conservation measures were actively undertaken over a 20-year period (1970-1989). However, more recent legislation (No. 18/1991 Agricultural Real Estate Act) includes two provisions that discourage maintaining and extending soil conservation practises. Hence, the former contour farming system has been abandoned in favour of the traditional, degradational farming methods. The mean annual sedimentation rate in reservoirs is moderate at 2.7 cm y-1 in the upper Racova Catchment and almost double that rate in Puscasi Reservoir at the catchment outlet. Consequently, land degradation remains a serious problem in the study area and effective soil conservation is urgently needed.</p>

scholarly journals Spatial analysis of demand for sparsely located ecosystem services using alternative index approaches

2019 ◽  
Author(s):  
Rubén Granado-Díaz ◽  
José A Gómez-Limón ◽  
Macario Rodríguez-Entrena ◽  
Anastasio J Villanueva
Keyword(s):  
Ecosystem Services ◽  
Spatial Analysis ◽  
Discrete Choice ◽  
Soil Conservation ◽  
Model Fit ◽  
Discrete Choice Experiments ◽  
Spatial Indices ◽  
Alternative Index ◽  
Olive Groves

Abstract This study focuses on the effects of spatial discounting and substitutes sites on the demand for ecosystem services (ES) provided by scattered agroecosystems. New ways of modelling these two effects are proposed, relying on area-based and density-based indices. Data from discrete choice experiments are used, based on a case study of Andalusian olive groves (southern Spain). The results show that model fit is significantly improved by the introduction of these spatial indices, with the best outcome found for the area-based index combined with the inverse of the distance. Results provide evidence of substantial spatial heterogeneity depending on the ES (carbon sequestration, soil conservation and biodiversity), indicating different economic jurisdictions.

Assessment of Land Degradation Vulnerability using Geospatial Technique: A Case Study of Kachchh District of Gujarat, India

2021 ◽  
Author(s):  
Manish Parmar ◽  
Zalak Bhawsar ◽  
Mit Kotecha ◽  
Alpana Shukla ◽  
A. S. Rajawat
Keyword(s):  
Land Degradation ◽  
Geospatial Technique

On the Fast Track to Land Degradation? A case study of the impact of the Fast Track Land Reform Programme in Kadoma District, Zimbabwe

Geography ◽  
2007 ◽  
Vol 92 (3) ◽  
pp. 208-220 ◽  
Author(s):  
R.C. Fox ◽  
E. Chigumira ◽  
K.M. Rowntree
Keyword(s):  
Land Degradation ◽  
Land Reform ◽  
Fast Track ◽  
Reform Programme ◽  
The Impact

Can human-induced land degradation be distinguished from the effects of rainfall variability? A case study in South Africa

2007 ◽  
Vol 68 (2) ◽  
pp. 271-297 ◽  
Author(s):  
K.J. Wessels ◽  
S.D. Prince ◽  
J. Malherbe ◽  
J. Small ◽  
P.E. Frost ◽  
...  
Keyword(s):  
South Africa ◽  
Land Degradation ◽  
Rainfall Variability

An adapted method to assess soil organic carbon stocks in a high mountain region: A LDN case study from Kirgistan

2021 ◽  
Author(s):  
Margarete Korintenberg ◽  
Judith Walter ◽  
Katja Märten ◽  
Jutta Zeitz
Keyword(s):  
Bulk Density ◽  
Land Degradation ◽  
Carbon Stocks ◽  
Mountain Region ◽  
High Mountain ◽  
Fine Soil ◽  
Soil Organic Carbon Stocks ◽  
Global Data ◽  
Soc Stocks

<p>The Sustainable Development Goals (SDGs) adopetd by the United Nations in 2016 include the SDG 15.3 „Land Degradation Neutrality (LDN)“, which aims to reduce land degradation by national efforts of the member states. Three indicators for land degradation were gloablly identified: landcover, land productivity and soil organic carbon stocks (SOC). In particular, the assessment of SOC is challenging in countries where (a) spatial digital data is largely missing and (b) SOC mapping is difficult due to remotness typical for high mountain regions . Global data provided by the Secretariat of the United Nations Convention to Combat Desertification (UNCCD) may be used for reporting, but experience from various countries indicates inaccuracies due to generalisation. This is especially the case for SOC. Moreover, to report on changes in SOC stocks, a comprehensive baseline is mandatory. In order to approach these challenges, Kirgistan, which has signed the SDG’s but still lacks a baseline for SOC, has been chosen for a case study.</p><p>In a multinational project we developed a scientifically based method to map and assess SOC stocks enabling a nationwide upscaling of SOC data (baseline). Using globally available data on landcover, elevation, climate and national soil data, „representative SOC units“ were identified prior to sampling. We assume that mainly these factors determine the spatial variability of SOC and that similar SOC stocks can be expected at comparable site conditions. More than 90% of the surface area, that potentially store SOC, is coverd by only 20 representative units, which were sampled 3-fold in the field. Sampling location within a single unit was determined using a drone to identify a representative location. Using the drone was especially helpful as sampling sites in a high mountain region were often extremely remote. During sampling small-scale variability of SOC was considered in the field. To determine SOC stocks, bulk density of the fine soil, coarse fragments and amount of roots were measured in the laboratory. Furthermore, pH, clay, silt and sand content were analysed to identify further drivers for SOC distribution.</p><p>Results show that spatial distribution of SOC in such a high mountain region is mainly controlled by landcover (cropland, grassland, forest), elevation, bulk density and clay content. Within single landcover classes topographic indices, such as aspect, further determine SOC distribution. This is especially the case for grassland, which is the dominant landcover in Kirgistan (53%). For the assessment of SOC stocks different approaches were compared. For instance, precise assessment of stocks using the bulk density of the fine soil corrected for coarse fragments leads to significantly lower SOC stocks when compared to the global data provided by the UNCCD.</p>

The Risk of Water Erosion on the Foothills of the Middle High Atlas (Morocco): Tagueleft Basin Case Study : خطر التعرية المائية على السفوح بالأطلس الكبير الأوسط (المغرب): دراسة حالة حوض تاكلفت

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Rizki Mohamed
Keyword(s):  
Land Degradation ◽  
Local Development ◽  
Remote Sensing Data ◽  
Potential Method ◽  
Water Erosion ◽  
High Atlas ◽  
Negative Impacts ◽  
The Impact

The Tagueleft basin is geographically located in the northern edges of the Middle High Atlas, which is a geomorphological fragile area. The impact of human activity has accelerated water erosion in this mountains area. This is reflected in dynamic and unstable foothills, a decrease in forests density and degradation in the production of the land. On the other hand, land degradation due to human overexploitation of natural resources has increased land degradation in the area. The interest in the risk of erosion on the foothills in the area under study comes in the context of our contribution to clarify the role of geomatical and geomorphological approaches in explaining and identifying the mechanisms responsible for current foothills dynamism through water erosion and its negative impacts on the environment and local development. The aim of the study was to use the EPM (Erosion Potential Méthod) which is formulated by Slobodan Gavrilovic for erosion in mountainous areas and to test the reliability of its results based on fieldwork and remote sensing data. The results of the erosion assessment and its quantification by applying the coefficient (W) for the theoretical model in the area under study have shown that erosion is very important and it touches on wide areas as it appears through the domain classification of the distribution erosion in Tagueleft basin.

Using 137Cs and 210Pbex measurements to explore the effectiveness of soil conservation measures in semi-arid lands: a case study in the Kouhin region of Iran

2018 ◽  
Vol 19 (4) ◽  
pp. 2103-2113 ◽  
Author(s):  
Maral Khodadadi ◽  
Lionel Mabit ◽  
Mohammad Zaman ◽  
Paolo Porto ◽  
Manouchehr Gorji
Keyword(s):  
Soil Conservation ◽  
Arid Lands ◽  
Conservation Measures ◽  
Soil Conservation Measures ◽  
Semi Arid
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