Rapid Assessment of Flood Inundation and Damaged Rice Area in Red River Delta from Sentinel 1A Imagery

The Red River Delta (RRD), including 11 provinces, is one of the four largest rice-growing areas in Vietnam. Tropical storms often occur and cause serious flooding from May to October annually in the RRD, which strongly affects the productivity of the summer–autumn rice, one of two main rice crops. Therefore, the rapid assessment of damaged rice area by flooding inundation is critical for farmers and the government. In this study, we proposed a methodology for quick estimation of rice areas damaged by flooding using Sentinel 1A (S1A) imagery. Firstly, the latest rice map was produced. Then, a Near Real-Time (NRT) flood map, which is estimated from S1A images at the closest time to a flooding event, was generated by excluding the yearly permanent map from the temporal water map. Our experiment was conducted for the assessment of damaged rice area by flooding from the tropical storm named Son-Tinh, which happened on 19–21 July 2018. A Support Vector Machine (SVM) classifier was applied on time-series of S1A VV with VH data (VVVH) to obtain a rice map for the winter-spring season of 2018 with 90.5% Overall Accuracy (OA) and 2.37% difference (12,544 ha) from the General Statistics Office (GSO) of Vietnam’s reports for the whole region. Then, the Otsu thresholding method was applied for permanent water surface extraction and NRT flood mapping. The estimated damaged area was compared to available provincial and communal statistics for validation and further analysis. Right after the Son-Tinh storm, the estimation of inundated rice was approximately 50% of the total rice area in the RRD (271,092 ha). As a result, rice damage level strongly corresponds to the inundation period. In addition, the rice-flooding frequency map over the RRD was estimated to show rice fields suffering a high risk of flooding during the rainy season in the RRD. Our experiment’s results highlight the potential of using Synthetic-Aperture Radar (SAR) imagery for fast monitoring and assessment of paddy rice areas affected by flooding at a large scale in the RRD region.

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Policies supporting for agricultural cooperatives in Vietnam: An experience from agricultural cooperatives in the Red River Delta

Technium Social Sciences Journal ◽

10.47577/tssj.v25i1.4967 ◽

2021 ◽

Vol 25 ◽

pp. 126-133

Author(s):

Hai Ninh Nguyen Thi

Keyword(s):

Agricultural Sector ◽

River Delta ◽

Red River ◽

Primary Data ◽

Agricultural Cooperatives ◽

Red River Delta ◽

Farm Land ◽

Advantages And Disadvantages ◽

The Government ◽

The Impact

Agricultural cooperatives have been established in Vietnam since the 1950s. During its development, agricultural cooperatives have made significant contributions to the growth of agricultural sector and to the improvement of farmers' income who are members of the cooperatives. Since Vietnam implemented the "Innovation-Doi moi" in 1986, the Government has continued to issue many policies to support for agricultural cooperatives. However, the impact of these policies on the development of almost all agricultural cooperatives has not been as expected. This paper aims to analyze the implementation of several policies supporting for agricultural cooperatives; to identify advantages and disadvantages of these policies; and to propose solutions for improving policies in the furture. In addition to secondary data from the Vietnam Cooperative Alliance, this paper uses primary data collected from 60 agricultural cooperatives in the Red River Delta to analyze the implementation of policies on cooperative staffs training, cooperative finance supporting, and cooperative land supporting. Bascially, the results show that the policy on training cooperative staff is quite well implemented, it helps to improve the capacity of cooperative managers in all surveyed cooperatives. In contrast, the finance supporting policy has many regulations that make it difficult for agricultural cooperatives to access capital, only nearly 30% of surveyed cooperatives get loans for production. Similarly, the land supporting policy also has unreasonable regulations which prevent agricultural cooperatives from scaling-up production because of the lack of farm-land. Consequently, about 60% of surveyed cooperatives are supported to rent farm-land for expanding agricultural production.

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Large-Scale Land Concessions, Migration, and Land Use: The Paradox of Industrial Estates in the Red River Delta of Vietnam and Rubber Plantations of Northeast Cambodia

Land ◽

10.3390/land7020077 ◽

2018 ◽

Vol 7 (2) ◽

pp. 77 ◽

Cited By ~ 5

Author(s):

Jefferson Fox ◽

Tuyen Nghiem ◽

Ham Kimkong ◽

Kaspar Hurni ◽

Ian Baird

Keyword(s):

Land Use ◽

Large Scale ◽

River Delta ◽

Red River ◽

Red River Delta ◽

Rubber Plantations ◽

Industrial Estates ◽

Large Scale Land

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Pesticide distribution and use in vegetable production in the Red River Delta of Vietnam

Renewable Agriculture and Food Systems ◽

10.1017/s1742170509002567 ◽

2009 ◽

Vol 24 (3) ◽

pp. 174-185 ◽

Cited By ~ 33

Author(s):

Pham Van Hoi ◽

Arthur P.J. Mol ◽

Peter Oosterveer ◽

Paul J. van den Brink

Keyword(s):

Vital Role ◽

River Delta ◽

Plant Diseases ◽

Red River ◽

Natural Food ◽

Vegetable Production ◽

Negative Effects ◽

Red River Delta ◽

Positive Effects ◽

The Government

AbstractFor a long time pesticides attracted interest from the Vietnamese governments and farmers for their positive effects in protecting crop yield losses resulting from pests and other plant diseases. Recently, the negative effects of pesticides on human health, natural food chains and the environment are increasingly being taken into account by both state and non-state actors. Striking a balance between positive and negative effects is complicated as, most likely, pesticides will continue to maintain their vital role in an agriculture-based country such as Vietnam. However, recently a shift can be noticed in farmers' selection and application of pesticides, initiated mainly by farmers themselves and to a lesser extent also by other actors such as the government, pesticide companies and distributors. This article provides an empirical insight into this shift, based on the results from research in four provinces in the Red River Delta. Possible implications for policies toward greening pesticide handling practices in vegetable production are drawn, such as removing inexpensive pesticides (often associated with high toxicity) from the market, giving technical training on pesticide selection and use to farmers, and reconsidering the role different actors can play in future safe vegetable production programs.

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Towards an environmental history of the eastern Red River Delta, Vietnam, c.900–1400

Journal of Southeast Asian Studies ◽

10.1017/s0022463414000319 ◽

2014 ◽

Vol 45 (3) ◽

pp. 315-337 ◽

Cited By ~ 2

Author(s):

Li Tana

Keyword(s):

Environmental History ◽

Large Scale ◽

River Delta ◽

Red River ◽

Ceramic Production ◽

Eastern Region ◽

Red River Delta ◽

Leading Schools ◽

Vietnamese Buddhism ◽

Ceramics Industry

This article focuses on the eastern region of the Red River Delta, Vietnam, between the tenth and sixteenth centuries. This area was an important centre of economic and population growth in Đại Việt in the thirteenth and fourteenth centuries, and nurtured Đại Việt's sophisticated and renowned ceramics industry, hosted leading schools of Vietnamese Buddhism and bred a rising class of scholars and bureaucrats. The region's rapid rise as an economic and political centre was, however, also the key to its undoing. The sudden spike in population density, and the intensive logging carried out for ceramic production, and temple and ship building, overtaxed the area's natural resources. The burden on the local ecology was exacerbated by the Trần dynasty's dyke building project, which shifted the river's course. The ensuing environmental deterioration might have been one major reason for the Vietnamese forsaking the large-scale ceramic production in Chu Đậu, deserting their main port, Vân Đồn, and for the Chinese abandoning a historical maritime invasion route.

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Climate Change and Land Use Change of Rural Households in The Red River Delta, Vietnam

Journal of Economics and Development ◽

10.33301/2013.15.02.05 ◽

2013 ◽

pp. 79-94

Author(s):

Ngoc Luu Bich

Keyword(s):

Climate Change ◽

Land Use ◽

Agricultural Land ◽

Rural Households ◽

River Delta ◽

Red River ◽

Red River Delta ◽

Sea Levels ◽

Main Production ◽

Farming Households

Climate change (CC) and its impacts on the socio-economy and the development of communities has become an issue causing very special concern. The rise in global temperatures, in sea levels, extreme weather phenomena, and salinization have occurred more and more and have directly influenced the livelihoods of rural households in the Red River Delta – one of the two regions projected to suffer strongly from climate change in Vietnam. For farming households in this region, the major and traditional livelihoods are based on main production materials as agricultural land, or aquacultural water surface Changes in the land use of rural households in the Red River Delta during recent times was influenced strongly by the Renovation policy in agriculture as well as the process of industrialization and modernization in the country. Climate change over the past 5 years (2005-2011) has started influencing household land use with the concrete manifestations being the reduction of the area cultivated and the changing of the purpose of land use.

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