Mapping of Soil Salinity Using the Landsat 8 Image and Direct Field Measurements: A Case Study of the Tadla Plain, Morocco

Didi, Salahddine; Housni, Fatima Ezzahra; Toro, Humberto Bracamontes del; Najine, Abdessamad

doi:10.1007/s12524-019-00979-7

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…• Towards the center of the map, the Tadla basin is characterized by a gradual reduce in the values of the residual anomaly from the North to the South. This result is confirmed by the results of geological and geoelectric studies, which conclude that the thickness of the aquifer system of the Tadla increase from the North to the South, as shown in Figures (5)(6).…”

Section: Figure3 Gravity Map Of the Tadla Basin Anomalysupporting

confidence: 78%

Gravimetric contributions to the study of the collapsed structures in northeast Tadla Plain:structural and hydrogeological implications

Didi¹,

Najine²

2022

SPR

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This study was realized in the north-east of the plain of Tadla, in the region of Beni Mellal-khenifra, Morocco. The main aim of this research is to establish the geometry and hydrogeology characteristics of the region's aquifer system, based on the results of analysis and interpretation of deep-drilling data, and on gravimetric and electrical survey measurements. First, the regional gradient was determined, then the initial data was extracted, and based on the extracted data, we created the gravity map of the Bouguer, where the anomalies are clearer. The examination of the Bouguer anomaly's gravity map reveals the existence of a regional gradient. These anomalies are typically found in outcrop areas of the basement and differences in thickness of the sediment cover in the study area. The Electrical survey measurements, and the interpretation of the deep-drilling data, confirm the results of gravimetry survey, after applying different techniques such as horizontal gradiometer and upward extension, on the Gravimetric map. The founded results allowed us to draw up a structural map showing the system faults, which is accountable for the study area structure. The structural map is a very useful tool to guide future hydrogeological researches in the plain of Tadla.

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Section: Figure3 Gravity Map Of the Tadla Basin Anomalysupporting

confidence: 78%

Gravimetric contributions to the study of the collapsed structures in northeast Tadla Plain:structural and hydrogeological implications

Didi¹,

Najine²

2022

SPR

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“…Remote sensing has been advocated as a promising technology over conventional methods of soil salinity estimation and monitoring over large areas in terms of time and cost [17,18]. Landsat sensors have been widely used in soil salinity and land use land cover mapping due to long-term coverage [19][20][21]. The limitation in the use of Sentinel 2 multispectral images, which provide better spatial resolution (10 m) than Landsat (30 m), is that they have only been available from 2015 onwards.…”

Section: Introductionmentioning

confidence: 99%

Linking Long-Term Changes in Soil Salinity to Paddy Land Abandonment in Jaffna Peninsula, Sri Lanka

Gopalakrishnan

Kumar

2021

Agriculture

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Soil salinity is a serious threat to coastal agriculture and has resulted in a significant reduction in agricultural output in many regions. Jaffna Peninsula, a semi-arid region located in the northern-most part of Sri Lanka, is also a victim of the adverse effects of coastal salinity. This study investigated long-term soil salinity changes and their link with agricultural land use changes, especially paddy land. Two Landsat images from 1988 and 2019 were used to map soil salinity distribution and changes. Another set of images was analyzed at four temporal periods to map abandoned paddy lands. A comparison of changes in soil salinity with abandoned paddy lands showed that abandoned paddy lands had significantly higher salinity than active paddy lands, confirming that increasing salts owing to the high levels of sea water intrusion in the soils, as well as higher water salinity in wells used for irrigation, could be the major drivers of degradation of paddy lands. The results also showed that there was a dramatic increase in soil salinity (1.4-fold) in the coastal lowlands of Jaffna Peninsula. 64.6% of the salinity-affected land was identified as being in the extreme saline category. In addition to reducing net arable lands, soil salinization has serious implications for food security and the livelihoods of farmers, potentially impacting the regional and national economy.

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“…Trong bối cảnh này, các bộ dữ liệu vệ tinh tiềm năng và các kỹ thuật phân tích ảnh đã góp phần vào việc lập bản đồ độ mặn của đất một cách chính xác và kinh tế [4][5]. Các ảnh vệ tinh đa phổ như MODIS (250 m) [6], Landsat TM (30 m) [7], Landsat ETM+ (30 m) [8][9], Landsat 8 (30 m) [10][11], đã được sử dụng rộng rãi để lập bản đồ độ mặn của đất. Các chỉ số độ mặn khác nhau đã được lấy từ hình ảnh vệ tinh và được sử dụng để xác định các khu vực bị ảnh hưởng bởi xâm nhập mặn.…”

Section: Mở đầUunclassified

Nghiên cứu đánh giá hiện trạng xâm nhập mặn dựa trên ảnh vệ tinh Sentinel 2 khu vực tỉnh Quảng Trị

Phong¹

2023

VNJHM

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Độ mặn là một đặc tính quan trọng trong việc đánh giá hiện trạng xâm nhập mặn. Nghiên cứu được thực hiện để phát triển một mô hình dự báo độ mặn của đất hiệu quả sử dụng dữ liệu vệ tinh Sentinel 2A cho tỉnh Quảng Trị. Ban đầu các mẫu đất thu thập được phân tích độ mặn (ECe). Sau đó phân tích hồi quy tuyến tính được thực hiện giữa các giá trị ECe thu được với cái chỉ số của đất thu được từ ảnh Sentinel 2. Kết quả nghiên cứu cho thấy ECe có mối tương quan cao với các băng tần riêng lẻ SWIR1 và chỉ số SBI (chỉ số độ sáng đơn giản) với R 2 = 0,65. Kết quả nghiên cứu chứng minh khả năng ước tính đáng tin cậy EC dựa trên sử dụng dữ liệu Sentinel 2.Từ khóa: Ảnh vệ tinh; Sentinel 2; Độ mặn; Phân tích hồi quy tuyến tính; SWIR1; SBI.

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Mapping of Soil Salinity Using the Landsat 8 Image and Direct Field Measurements: A Case Study of the Tadla Plain, Morocco

Cited by 7 publications

References 21 publications

Gravimetric contributions to the study of the collapsed structures in northeast Tadla Plain:structural and hydrogeological implications

Gravimetric contributions to the study of the collapsed structures in northeast Tadla Plain:structural and hydrogeological implications

Linking Long-Term Changes in Soil Salinity to Paddy Land Abandonment in Jaffna Peninsula, Sri Lanka

Nghiên cứu đánh giá hiện trạng xâm nhập mặn dựa trên ảnh vệ tinh Sentinel 2 khu vực tỉnh Quảng Trị

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