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Data List - Lake Biwa

• Major Data Source Documents

  Category	Item Name	Item Title	Item	Remarks
  ILEC Publications	Databook of World Lake Environments (Asia and Oceania)	Lake Biwa	asi-01.html
  	GEF/WB/ILEC LBMI Project	Lake Biwa	05_Lake_Biwa_27February2006.pdf

• Figures and Drawings

  Category	Item Name	Item Title	Item	More Info.
  D. Physiographic Features	D1 Geographical	Bathymetric map	asi01-01.gif
  	D2 Climatic	Average depth of maximum snow accumulation (1931--1960)	asi01-03.gif
  		Distribution of mean annual precipitation (1931-1960)	asi01-02.gif
  	D3 Hydrodynamic	Gyre system (1983)	JJL-SE	See Figs. 6 and 7 in particular.
  		Internal Seiche (1974)	JJL-SK	See Figs. 6, 11 and 12 in particular.
  		Large amplitude nonlinear internal surge	JJL-CJ	See Figs. 4 and 5 in particular.
  		Wind fields and their effect on water circulation	JJL-SE	See Figs. 2, 3, 4,5,6 and 9 in particulr.
  	D4 Hydrological	Change in groundwater seepage rate into lake (1994)	JJL-MT	See Fig. 4 and 8 in particular.  A concluding statement is "...the significant role precipitation plays in the groundwater seepage rate..."
  	D5 Sedimentological	Sedimentary environments Inferred from a lithofacies of the 1400 m core sample	JJL-KT	See Figs. 6, 7, 8, and 9 in particular. See Figs. 1, 2, and 3 in particular.
  E. Water Quality	E1 Transparency	Transparency yearly mean, Northern Lake (1921-1980)	asi01-04.gif
  		Transparency yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-4.png
  	E2 pH	pH yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-5.png
  	E3 SS, Solids	SS yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-7.png
  	E4 DO	Bottom sediment oxygen demand in the northern basin	JJL-NG	See Figs. 6, 7, 8 and 9 in particular.See Figs. 3, 4 and 5, in particular.
  		DO (1921-1980)	asi01-05.gif
  	E5-1 BOD	BOD yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-6.png
  		BOD, distribution and time trend (1967-1982)	asi01-07.gif
  	E5-2 COD	COD yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-1.png
  		Organic matter, Southern Lake, KMnO4	asi01-06.gif
  	E6 Chlorophyll	Horizontal distribution and seasonal change of chlorophyll a in the South Basin (Aug.1978 -Mar.1979)	JJL-MN	See Fig.2 in particular.   One of the concluding remarks, "....Chlorophyll-a conc. tended to change with three peaks in which dominant alga species differed among stations."
  	E7 Nitrogen	T-N concentration, seasonal and annual trends, Southern Lake, Northern Lake, Seta River (1970-1982)	asi01-08.gif
  		T-N yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-2.png
  	E8 Phosphorus	T-P concentration, seasonal and annual trends, Southern Lake, Northern Lake, Seta River (1972-1982)	asi01-09.gif
  		T-P yearly mean, Southern Lake, Northern Lake, Seta River (1979-2015)	asi-01-3.png
  	E9 Chloride, EC and Conductivity	Long-term trends of chloride concentration ; (1) change in concentration (1920-2005)	JJL-KH
  		Long-term trends of chloride concentration; (2) chloride loadings from catchment	JJL-KH	See Abstract and Table 3 in particular.
  F. Biological Features	F3 Primary Production	Bacterioplankton production and dominant algal species in the north basin (Feb.-June 1990)	JJL-SN	See Figs. 3 and 4 in particular.
  		Dominant phytoplankton, chlorophyll a and nutrient levels (Feb.-Dec. 1981)	JJL-YT	See Figs. 3-11.
  		Epiphytic and planktonic algae and biogeochemical characteristics in reed zones (1999)	JJL-OM	See Fig.4 in particular.
  		Photosynthesis and spectral absorption, of phytoplankton during stratification in Northern Basin (1994-1995)	JJL-YT	See Figures 6-14.  Conclusion: "...phytoplankton could efficiently utilize the absorbed light energy for phtosynthsis under weak radiation in deep water."
  		Seasonal change, gross, Southern Lake (~1982)	asi01-10.gif
  		Sestonic C : N : P ratios, nutritional state of phytoplankton, South Basin (May 1987 -May 1988)	JJL-MN	See Figs. 2 and 3.   A concluding remarks "...phytoplankton were exposed frequently to moderate or severe phosphorus deficiency from May to October 1987 but little therafter until May 1988, whereas they were not in the state of severe nitrogen deficiency except for a given time in November of 1987."
  	F4 Biomass	Comparison of the distribution of submerged macrophytebeds in 1994 (left) and 2000 (right) in the southern basin	lre_199_f4.gif	Fig. 4. Comparison of the distribution of submerged macrophyte beds in 1994 (left) and 2000 (right) in the southern basin of Lake Biwa © 2004  John Wiley & Sons, Inc.  https://onlinelibrary.wiley.com/doi/10.1046/j.1440-1770.2002.00199.x
  		Distribution of submerged macrophyte beds in the whole of Lake Biwa in 2000	lre_199_f3.gif	Fig. 3. Distribution of submerged macrophyte beds in the whole of Lake Biwa in 2000, including all four classes of coverage. in © 2004  John Wiley & Sons, Inc.  https://onlinelibrary.wiley.com/doi/10.1046/j.1440-1770.2002.00199.x
  		Submerged macrophyte, southern basin, echo-sounder (1994-2001)	JJl-TO	See Figs. 6, 7, 8 and 9 in particular.See Fig.4 and 5, in particular.
  		Submerged macrophytes, southern basin (2007, 2002)	JJL-HH	See Figs. 6, 7, 8 and 9 in particular.See Abstract, Table 1 and Fig 2 in particular.
  		Submerged macrophytes, southern basin (2017)	JJL-HH	See Figs. 6, 7, 8 and 9 in particular.See Abstract, Tables 1 and 2, Fig. 3 in particular
  	F6 Past Trends	Fluctuation of Elodea nuttallii, an alien species (1988-1989)	JJL-EH	See Fig. 7 in particular.
  		Phytoplankton biomass (1950-1980)	asi01-11.gif
  		Population densities of main phytoplankton taxa, monthly (1961-1975	asi01-12.gif
  		Sudden expansion of submerged macrophytes (2008)	JJL-HH	See Figs. 6, 7, 8 and 9 in particular.See Fig.2, 3 and 4 in particular.
  G. Socio-economic Conditions	G1 Land Use	Percentages of the watershed land designated by respective land use plans	lre_251_f2.gif	Fig. 2. The percentages of the specified areas of land use controls in the entire Lake Biwa watershed. © 2004  John Wiley & Sons, Inc.  https://onlinelibrary.wiley.com/doi/10.1111/j.1440-1770.2004.00251.x
  	G2 Industries	Industrial production trend (1975-1981)	asi01-13.gif
  	G3 Population	Population increase trend (1950-1985)	asi01-14.gif
  H. Lake Utilization	H2 Water Resource	Lake Biwa – Yodo River water use (as in 1980)	asi01-15.gif
  I. Deterioration and Hazards	I2 Toxic Contamination	BHC concentration (1976-1979)	asi01-16.gif
  		Past trend of BHC accumulation in the body of Chaenogobius isaza	asi01-17.gif
  		Past trend of CNP accumulation in the body of Chaenogobius isaza (1966-1981)	asi01-18.gif
  	I3 Eutrophication	Eutrophication trend of the North Basin (1966-1989)	JJL-YT	Figs. 1, 2 and 3 and Table 1 led to a conclusion, "...phosphorus sedimentation plays a decisive role in the delay of the eutrophication of Lake Biwa."

• Tables and Lists

  Category	Item Name	Item Title	Item	More Info.
  D. Physiographic Features	D2 Climatic	Monthly mean atmospheric temperature and precipitation (1951-1980); Monthly mean water temperature by depth (1982-1986)	asi-01-d2.txt
  	D4 Hydrological	Chemical study of precipitation on lake	JJL-YM	See Table 1. in particular.
  E. Water Quality	E1 Transparency	Monthly mean (1982-1986) for Station 1 (Northern Lake) and Station 2 (Southern Lake)	asi-01-e1.txt
  	E2 pH	Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e2.txt
  	E3 SS, Solids	Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e3.txt
  	E4 DO	Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e4.txt
  	E5 COD	Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e5.txt
  	E6 Chlorophyll	Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e6.txt
  	E7 Nitrogen	NH4-N, NO3-N, T-N: Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e7.txt
  	E8 Phosphorus	PO4-P, T-P: Monthly mean by depth (1982-1986) for Station 1 and Station 2	asi-01-e8.txt
  F. Biological Features	F2 Fauna	Ecological notes of the fishes and their Interspecific relations (1966)	JJL-TM	See Tables 1 and 2.
  	F4 Biomass	Submerged macrophytes (1964-1974)	asi-01-f4.txt
  	F6 Past Trends	Fishery production (1955-1980)	asi-01-f6.xls
  G. Socio-economic Conditions	G1 Land Use	Land Use in the Catchment Area, Natural (forests), agricultural, residential (1979); Agricultural (paddy, upland field, orchard, pasture) (1975-1984)	asi-01-g1.xls
  	G2 Industries	Production statistics; primary, secondary, tertiary (1981)	asi-01-g2.txt
  H. Lake Utilization	H2 Lake as Water Resource	Use types and amounts	asi-01-h2.txt
  I. Deterioration and Hazards	I2 Toxic Contamination	Main contaminants concentrations and	asi-01-i2.xls
  		Seasonal changes in pesticide concentrations at sampling stations I1 (upper) and S1 (lower).
  	I3 Eutrophication	T-N and T-P by source category (1960-1980)	asi-01-i3.txt
  J. Wastewater Treatment	J2 Nutrient Loads	N and P by source category (1979-1983)	asi-01-j2.txt

• Photos and Images

  Category	Item Name	Item Title	Item	More Info.
  Photos	Areal photo	Northward view of the whole lake from southern end	asi01.jpg