of Loess Plateau of Loess Plateau Average soil erosion 3700t/km 2 - PowerPoint PPT Presentation

A Successful Example Ecological restoration Ecological restoration of Loess Plateau of Loess Plateau Average soil erosion 3700t/km 2 .a Total region area 0.62 million km 2 Sediment 1.6billion tons/year Soil erosion area 0.43 million km 2 Silt content 37.4kg/m 3 (average) Serious erosion area 0.27 million km 2 500-600kg/m 3 (max) 2017/12/4 2017/12/4

Vertical distribution of soil erosion patterns along slopes 2017/12/4

The eroded Loess Plateau 2017/12/4

Cultivation on slope land to cause soil erosion 2017/12/4 2017/12/4

Soil loss from cultivation on steep slope lands 2 2 陕西的水土流失与土地退化 2017/12/4

Poverty ➢ 76% of poverty counties are in severe soil erosion regions ➢ 90% of poverty people live in severe soil erosion regions. 2017/12/4 2017/12/4

To build terraced fields on slope land was one of the important measures to reduce soil erosion 2017/12/4 2017/12/4

Terraced fields have many functions to control erosion and to increase grain yield and farmer ’ s income, but it is a big and consuming work. 2017/12/4 2017/12/4

In 1999, The Premier Zhu Rongji inspected soil erosion and conservation on the Loess Plateau with the Governors of Shaanxi Province They were thinking how to do with the broad area suffering soil erosion! 2017/12/4 2017/12/4

Grain for Green Project After inspection to Loess Plateau they visited our Institute and discussed this issue with scientists. Then the Grain for Green Project was proposed . To convey cropping land on steep slopes to planting trees/grass (more than 25 degree in southwest region; more than 15 degree in northwest region) 2017/12/4

Compensation Government will give some compensation including grain, cash and seedling fee South China South China North China North China • Grain 2250 kg/ha.year • Grain 1500 kg/ha.year • Cash 1875 yuan/ha.year • Cash 1350 yuan/ha.year • Seedling fee 750 yuan/ha • Seedling fee 750 yuan/ha 2017/12/4

Progress & Impacts • To the end of 2013, 9.3 million ha of slope farmland has been conversed into forest/grassland • 17.5 million ha of barren mountains and hills were planted trees/grass. Forest and grass cover increased by about 4.5% for the whole China. 2017/12/4

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Planting trees in fish-scale pits 2017/12/4 2017/12/4

Reservoir ISWC, CAS/MWR, YANGLING ,CHINA 2017/12/4

Dam-land in the gully 2017/12/4

京津风沙源治理工程 The project of desertification control around Beijing 2017/12/4 2017/12/4

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Integrated SWC model of watershed in Loess Plateau terrace Tree planting Prohibition Farming road Check dam

After implementing small watershed comprehensive control for 20 years, eco- environment has greatly improved. 2017/12/4 2017/12/4

After 10 yr of implementing GGP, vegetation area increased, toward to north 400 km 2017/12/4 2017/12/4

Sediment load decreased in Yellow river 1970-1989 1990-2009 2000-2009 2017/12/4

Thank You very much for your attention 2017/12/4 2017/12/4