词频

关键词

词频

关键词

词频

关键词

456

Non-point source pollution

45

Nitrate

29

Remote sensing

218

Water quality

44

GIS

28

Heavy metals

96

Phosphorus

43

Watershed

27

Water pollution

84

Nitrogen

42

Sediment

27

Modeling

84

Non-point sources

42

Pollution

22

Soil erosion

66

Eutrophication

39

Groundwater

21

China

60

Runoff

39

Watershed management

20

Stormwater

55

Nutrients

37

Agriculture

20

AnnAGNPS

54

SWAT

33

Best management practices

47

Land use

32

Diffuse pollution